Water movement in general can be utilised to produce what has been termed as ‘hydropower’. This may range from ocean waves to falling water and underwater currents. The hydropower system is used to produce electricity by spinning the turbine generator or simply for mechanical purposes.

Currently, hydropower is the most common way to generate electricity worldwide, in the form of renewable energy. Manmade hydropower can help in flood control as well as in irrigation. Depending on the type of the hydro project and the state of the land before the project, the lake produced can be a positive aspect of an aquatic ecosystem.

The structures of a hydropower plant, such as canals, tunnels, dams, reservoirs, access roads, and so on, are useful in relation to the area’s development. On the other hand, negative aspects can be: siltation, soil erosion, soil and water salinity, obstruction of the free passage between oceans and rivers, weed growth, floods due to dam failures, as well as possible disease spread by organisms that live in stagnant water, and the possibility of damage to natural resources, such as fish.

In many parts of the world, development within this sector of hydropower is still expanding, mostly for generating electricity.

However, in some Western countries, such as USA, the hydropower has peaked within the last two decades of the last century (ESA21).

SOLAR

Using sunlight and/or sun heat to generate energy in the form of electricity (or for heating systems) is one of the growing ways in which solar energy is used and applied. From the small calculator to the satellites orbiting the earth, solar cells can provide the energy in different ways and in different processes.

The sunlight or heat can be used directly or indirectly, as in the following examples:

Solar Cells

Solar Cells are usually referred to under the name photovoltaic or photoelectric cells. These cells convert sunlight directly into electricity. On a good sunny day, sunlight on one square meter of solar panel can produce enough power to run a 100W light bulb (MNRE, 2008).

Solar Water Heating

In some domestic settings, by pumping water through a pipe painted black the heat from the sun is used to heat water in glass panels placed on the house roof.

This heating system is mostly suitable in places where heat emanating from regular sunshine takes place.

Solar Furnaces

By collecting sun rays (e.g. by the use of mirrors) and concentrating them in a small space, a high temperature can be achieved in a specially designed furnace. Using this design, it was reported that a temperature of 3,000o C was reached at one of Odellio’s laboratories in France.

The above are very brief examples of how sunlight and sun heat are currently being used as another type of renewable source of energy.

The positive aspect in using sunlight and sun heat is that there is no waste or pollution. It can be used in sunny countries to get electricity in remote places when connection from the main electricity grid is not possible. Also, it can be used for small domestic appliance (e.g. heating water) as well as for charging batteries.

However, it is costly to convert the solar energy to electricity for large power stations. Also, it can be unreliable in an area where there is no regular sunlight.

WIND

By using the energy from moving air, large blades on windmills rotate to turn the turbines in order to generate electrical, thermal or mechanical energy. Energy (such as the production of electricity) from windmills requires large open spaces with high occurrence of wind throughout the year, in order to make it commercially viable.

The positive aspect of wind energy is that the source of energy is free. It generates no air or water pollution (apart during the hardware manufacturing process when fossil fuels used for this purpose).

The cost of electricity from windmills is declining. However, noise, shades, and light fluctuation, if windmills constructed close to residential areas, can be negative aspects. Also, the limited availability of space with regular wind pattern can be a problem in some parts of the world, plus, the possibility that windmills may harm wildlife, such as birds, is also a concern.

Najib Altawell

By utilising a range of technologies, renewable energy is produced from renewable sources mainly for the purpose of replacing the present limited resources associated with fossil fuels, as well as in finding economical, sustainable sources of energy. However, there is an urgent reason to search for an alternative source of energy, besides this. This urgency is connected to the issue of ‘global warming’, and the protection of the environment. By using certain types of renewable sources of energy, it is possible to balance the emission of known gaseous associated with fossil fuels, such as CO2, which, among other gases, reportedly is one of the main causes of global warming.

Some of the costs associated with renewable energy are in decline and may continue to decline in the foreseeable future (NREL, 2002).

In regard to the current prospect of ‘renewable energy’, presently there is fast growth and development taking place in this field. This is mainly due to the recently increased level of investments in a number of countries across the world, i.e. around $71 billion has been invested worldwide during the year 2007, in comparison to $55 billion in 2006 and $40 billion in 2005 (REN21, 2009).

BIOMASS

Various types of biomass materials such as agricultural crops, wood, animal waste, different species of grasses and fast growing bushes, can be used in one way or another, to produce heat and electricity, as well as fuel for transportation. In comparison with fossil fuel usage, the biomass industry is still small. Recently, however, the development in this field has been reported to be growing fast (REN21, 2009).

One of the reasons attributed to this kind of growth is related to the price increase of limited energy sources, such as crude oil.

The forest products industry is one of the biggest users of biomass, using it to generate heat and electricity. Cost for biomass is steadily decreasing in the shape of a downward straight line.

Biomass materials are part of the bio-cycle of the environment, i.e. natural raw materials, and therefore not as toxic as, for example, crude oil. This means it can break down relatively quickly into its natural elements.

Some of the biomass materials are widely available, and, on occasions, can be free or at a very low cost to purchase. In comparison to the other sources of renewable energy, biomass can decrease the CO2 in the atmosphere, if energy crops are used in rotational cycle, i.e. the amount (number) of crops burnt equal the same number of individual crops being planted, at the same time.

However, biomass fuels are still relatively expensive to produce on a large commercial scale (U.S. Department of Energy, 2009).

One aspect of using biomass as a source of energy is that to produce biomass materials (e.g. energy crops) there is a need for land and regular supply of water.

In the process of obtaining energy from biomass, various by-products will be produced, which may harm the environment if not dealt with, accordingly.

GEOTHERMAL

High temperature emitted from the earth’s core heats the water deep inside the ground. This kind of hot water can be used to heat (or cool) homes and commercial buildings as well as to generate electricity. This type of natural energy is usually referred to as the ‘geothermal energy system’.

A number of variations of geothermal energy use can be found across the world. For example, ocean thermal energy is currently being researched and used in some countries.

Three main classes of geothermal energy sources (Ostridge, 1998) are as follows:

1. Direct usage. Water heated by magma beneath the ground.

2. Steam that comes from superheated water (when there is pressure, this can be used to turn a turbine).

3. Dry steam. An external water source is pumped to fracture very hot rock and the steam resulting from this process will be used to turn turbines.

A positive aspect of geothermal is that it has a very high efficiency, while on the negative side; it may not be considered as being a renewable energy source, since more energy is taken out than nature can put in.

Heating in this method can be more costly than conventional systems. Another negative aspect remain in that geothermal is a local resource only. As the technology improves, the cost gradually decreases. This predicted reduction should be more obvious by the year 2020.

Najib Altawell

Water movement in general can be utilised to produce what has been termed as ‘hydropower’. This may range from ocean waves to falling water and underwater currents. The hydropower system is used to produce electricity by spinning the turbine generator or simply for mechanical purposes.

Currently, hydropower is the most common way to generate electricity worldwide, in the form of renewable energy. Manmade hydropower can help in flood control as well as in irrigation. Depending on the type of the hydro project and the state of the land before the project, the lake produced can be a positive aspect of an aquatic ecosystem.

The structures of a hydropower plant, such as canals, tunnels, dams, reservoirs, access roads, and so on, are useful in relation to the area’s development. On the other hand, negative aspects can be: siltation, soil erosion, soil and water salinity, obstruction of the free passage between oceans and rivers, weed growth, floods due to dam failures, as well as possible disease spread by organisms that live in stagnant water, and the possibility of damage to natural resources, such as fish.

In many parts of the world, development within this sector of hydropower is still expanding, mostly for generating electricity.

However, in some Western countries, such as USA, the hydropower has peaked within the last two decades of the last century (ESA21).

SOLAR

Using sunlight and/or sun heat to generate energy in the form of electricity (or for heating systems) is one of the growing ways in which solar energy is used and applied. From the small calculator to the satellites orbiting the earth, solar cells can provide the energy in different ways and in different processes.

The sunlight or heat can be used directly or indirectly, as in the following examples:

Solar Cells

Solar Cells are usually referred to under the name photovoltaic or photoelectric cells. These cells convert sunlight directly into electricity. On a good sunny day, sunlight on one square meter of solar panel can produce enough power to run a 100W light bulb (MNRE, 2008).

Solar Water Heating

In some domestic settings, by pumping water through a pipe painted black the heat from the sun is used to heat water in glass panels placed on the house roof.

This heating system is mostly suitable in places where heat emanating from regular sunshine takes place.

Solar Furnaces

By collecting sun rays (e.g. by the use of mirrors) and concentrating them in a small space, a high temperature can be achieved in a specially designed furnace. Using this design, it was reported that a temperature of 3,000o C was reached at one of Odellio’s laboratories in France.

The above are very brief examples of how sunlight and sun heat are currently being used as another type of renewable source of energy.

The positive aspect in using sunlight and sun heat is that there is no waste or pollution. It can be used in sunny countries to get electricity in remote places when connection from the main electricity grid is not possible. Also, it can be used for small domestic appliance (e.g. heating water) as well as for charging batteries.

However, it is costly to convert the solar energy to electricity for large power stations. Also, it can be unreliable in an area where there is no regular sunlight.

WIND

By using the energy from moving air, large blades on windmills rotate to turn the turbines in order to generate electrical, thermal or mechanical energy. Energy (such as the production of electricity) from windmills requires large open spaces with high occurrence of wind throughout the year, in order to make it commercially viable.

The positive aspect of wind energy is that the source of energy is free. It generates no air or water pollution (apart during the hardware manufacturing process when fossil fuels used for this purpose).

The cost of electricity from windmills is declining. However, noise, shades, and light fluctuation, if windmills constructed close to residential areas, can be negative aspects. Also, the limited availability of space with regular wind pattern can be a problem in some parts of the world, plus, the possibility that windmills may harm wildlife, such as birds, is also a concern.

Najib Altawell

By utilising a range of technologies, renewable energy is produced from renewable sources mainly for the purpose of replacing the present limited resources associated with fossil fuels, as well as in finding economical, sustainable sources of energy. However, there is an urgent reason to search for an alternative source of energy, besides this. This urgency is connected to the issue of ‘global warming’, and the protection of the environment. By using certain types of renewable sources of energy, it is possible to balance the emission of known gaseous associated with fossil fuels, such as CO2, which, among other gases, reportedly is one of the main causes of global warming.

Some of the costs associated with renewable energy are in decline and may continue to decline in the foreseeable future (NREL, 2002).

In regard to the current prospect of ‘renewable energy’, presently there is fast growth and development taking place in this field. This is mainly due to the recently increased level of investments in a number of countries across the world, i.e. around $71 billion has been invested worldwide during the year 2007, in comparison to $55 billion in 2006 and $40 billion in 2005 (REN21, 2009).

BIOMASS

Various types of biomass materials such as agricultural crops, wood, animal waste, different species of grasses and fast growing bushes, can be used in one way or another, to produce heat and electricity, as well as fuel for transportation. In comparison with fossil fuel usage, the biomass industry is still small. Recently, however, the development in this field has been reported to be growing fast (REN21, 2009).

One of the reasons attributed to this kind of growth is related to the price increase of limited energy sources, such as crude oil.

The forest products industry is one of the biggest users of biomass, using it to generate heat and electricity. Cost for biomass is steadily decreasing in the shape of a downward straight line.

Biomass materials are part of the bio-cycle of the environment, i.e. natural raw materials, and therefore not as toxic as, for example, crude oil. This means it can break down relatively quickly into its natural elements.

Some of the biomass materials are widely available, and, on occasions, can be free or at a very low cost to purchase. In comparison to the other sources of renewable energy, biomass can decrease the CO2 in the atmosphere, if energy crops are used in rotational cycle, i.e. the amount (number) of crops burnt equal the same number of individual crops being planted, at the same time.

However, biomass fuels are still relatively expensive to produce on a large commercial scale (U.S. Department of Energy, 2009).

One aspect of using biomass as a source of energy is that to produce biomass materials (e.g. energy crops) there is a need for land and regular supply of water.

In the process of obtaining energy from biomass, various by-products will be produced, which may harm the environment if not dealt with, accordingly.

GEOTHERMAL

High temperature emitted from the earth’s core heats the water deep inside the ground. This kind of hot water can be used to heat (or cool) homes and commercial buildings as well as to generate electricity. This type of natural energy is usually referred to as the ‘geothermal energy system’.

A number of variations of geothermal energy use can be found across the world. For example, ocean thermal energy is currently being researched and used in some countries.

Three main classes of geothermal energy sources (Ostridge, 1998) are as follows:

1. Direct usage. Water heated by magma beneath the ground.

2. Steam that comes from superheated water (when there is pressure, this can be used to turn a turbine).

3. Dry steam. An external water source is pumped to fracture very hot rock and the steam resulting from this process will be used to turn turbines.

A positive aspect of geothermal is that it has a very high efficiency, while on the negative side; it may not be considered as being a renewable energy source, since more energy is taken out than nature can put in.

Heating in this method can be more costly than conventional systems. Another negative aspect remain in that geothermal is a local resource only. As the technology improves, the cost gradually decreases. This predicted reduction should be more obvious by the year 2020.

Najib Altawell

Water movement in general can be utilised to produce what has been termed as ‘hydropower’. This may range from ocean waves to falling water and underwater currents. The hydropower system is used to produce electricity by spinning the turbine generator or simply for mechanical purposes.

Currently, hydropower is the most common way to generate electricity worldwide, in the form of renewable energy. Manmade hydropower can help in flood control as well as in irrigation. Depending on the type of the hydro project and the state of the land before the project, the lake produced can be a positive aspect of an aquatic ecosystem.

The structures of a hydropower plant, such as canals, tunnels, dams, reservoirs, access roads, and so on, are useful in relation to the area’s development. On the other hand, negative aspects can be: siltation, soil erosion, soil and water salinity, obstruction of the free passage between oceans and rivers, weed growth, floods due to dam failures, as well as possible disease spread by organisms that live in stagnant water, and the possibility of damage to natural resources, such as fish.

In many parts of the world, development within this sector of hydropower is still expanding, mostly for generating electricity.

However, in some Western countries, such as USA, the hydropower has peaked within the last two decades of the last century (ESA21).

SOLAR

Using sunlight and/or sun heat to generate energy in the form of electricity (or for heating systems) is one of the growing ways in which solar energy is used and applied. From the small calculator to the satellites orbiting the earth, solar cells can provide the energy in different ways and in different processes.

The sunlight or heat can be used directly or indirectly, as in the following examples:

Solar Cells

Solar Cells are usually referred to under the name photovoltaic or photoelectric cells. These cells convert sunlight directly into electricity. On a good sunny day, sunlight on one square meter of solar panel can produce enough power to run a 100W light bulb (MNRE, 2008).

Solar Water Heating

In some domestic settings, by pumping water through a pipe painted black the heat from the sun is used to heat water in glass panels placed on the house roof.

This heating system is mostly suitable in places where heat emanating from regular sunshine takes place.

Solar Furnaces

By collecting sun rays (e.g. by the use of mirrors) and concentrating them in a small space, a high temperature can be achieved in a specially designed furnace. Using this design, it was reported that a temperature of 3,000o C was reached at one of Odellio’s laboratories in France.

The above are very brief examples of how sunlight and sun heat are currently being used as another type of renewable source of energy.

The positive aspect in using sunlight and sun heat is that there is no waste or pollution. It can be used in sunny countries to get electricity in remote places when connection from the main electricity grid is not possible. Also, it can be used for small domestic appliance (e.g. heating water) as well as for charging batteries.

However, it is costly to convert the solar energy to electricity for large power stations. Also, it can be unreliable in an area where there is no regular sunlight.

WIND

By using the energy from moving air, large blades on windmills rotate to turn the turbines in order to generate electrical, thermal or mechanical energy. Energy (such as the production of electricity) from windmills requires large open spaces with high occurrence of wind throughout the year, in order to make it commercially viable.

The positive aspect of wind energy is that the source of energy is free. It generates no air or water pollution (apart during the hardware manufacturing process when fossil fuels used for this purpose).

The cost of electricity from windmills is declining. However, noise, shades, and light fluctuation, if windmills constructed close to residential areas, can be negative aspects. Also, the limited availability of space with regular wind pattern can be a problem in some parts of the world, plus, the possibility that windmills may harm wildlife, such as birds, is also a concern.

Najib Altawell

By utilising a range of technologies, renewable energy is produced from renewable sources mainly for the purpose of replacing the present limited resources associated with fossil fuels, as well as in finding economical, sustainable sources of energy. However, there is an urgent reason to search for an alternative source of energy, besides this. This urgency is connected to the issue of ‘global warming’, and the protection of the environment. By using certain types of renewable sources of energy, it is possible to balance the emission of known gaseous associated with fossil fuels, such as CO2, which, among other gases, reportedly is one of the main causes of global warming.

Some of the costs associated with renewable energy are in decline and may continue to decline in the foreseeable future (NREL, 2002).

In regard to the current prospect of ‘renewable energy’, presently there is fast growth and development taking place in this field. This is mainly due to the recently increased level of investments in a number of countries across the world, i.e. around $71 billion has been invested worldwide during the year 2007, in comparison to $55 billion in 2006 and $40 billion in 2005 (REN21, 2009).

BIOMASS

Various types of biomass materials such as agricultural crops, wood, animal waste, different species of grasses and fast growing bushes, can be used in one way or another, to produce heat and electricity, as well as fuel for transportation. In comparison with fossil fuel usage, the biomass industry is still small. Recently, however, the development in this field has been reported to be growing fast (REN21, 2009).

One of the reasons attributed to this kind of growth is related to the price increase of limited energy sources, such as crude oil.

The forest products industry is one of the biggest users of biomass, using it to generate heat and electricity. Cost for biomass is steadily decreasing in the shape of a downward straight line.

Biomass materials are part of the bio-cycle of the environment, i.e. natural raw materials, and therefore not as toxic as, for example, crude oil. This means it can break down relatively quickly into its natural elements.

Some of the biomass materials are widely available, and, on occasions, can be free or at a very low cost to purchase. In comparison to the other sources of renewable energy, biomass can decrease the CO2 in the atmosphere, if energy crops are used in rotational cycle, i.e. the amount (number) of crops burnt equal the same number of individual crops being planted, at the same time.

However, biomass fuels are still relatively expensive to produce on a large commercial scale (U.S. Department of Energy, 2009).

One aspect of using biomass as a source of energy is that to produce biomass materials (e.g. energy crops) there is a need for land and regular supply of water.

In the process of obtaining energy from biomass, various by-products will be produced, which may harm the environment if not dealt with, accordingly.

GEOTHERMAL

High temperature emitted from the earth’s core heats the water deep inside the ground. This kind of hot water can be used to heat (or cool) homes and commercial buildings as well as to generate electricity. This type of natural energy is usually referred to as the ‘geothermal energy system’.

A number of variations of geothermal energy use can be found across the world. For example, ocean thermal energy is currently being researched and used in some countries.

Three main classes of geothermal energy sources (Ostridge, 1998) are as follows:

1. Direct usage. Water heated by magma beneath the ground.

2. Steam that comes from superheated water (when there is pressure, this can be used to turn a turbine).

3. Dry steam. An external water source is pumped to fracture very hot rock and the steam resulting from this process will be used to turn turbines.

A positive aspect of geothermal is that it has a very high efficiency, while on the negative side; it may not be considered as being a renewable energy source, since more energy is taken out than nature can put in.

Heating in this method can be more costly than conventional systems. Another negative aspect remain in that geothermal is a local resource only. As the technology improves, the cost gradually decreases. This predicted reduction should be more obvious by the year 2020.

Najib Altawell

There are 2 types of technology used for this process, thermal and non-thermal. Thermal technologies include gasification, pyrolysis, thermal depolymerization, and plasma arc gasification or PGP. The non-thermal technologies are anaerobic digestion, fermentation and mechanical biological treatment. In thermal technologies, most of the carbon content is emitted to the atmosphere as carbon dioxide. This is when final combustion of the products came from pyrolysis and gasification. An example of gasification waste to energy system is the Biosphere Technology. It can ecologically and efficiently convert waste materials into green energy thus it greatly helps in waste management and green energy production.

For non-thermal technology, this occurs when the waste was landfilled because there is an anaerobic decomposition for the biodegradable (biomass) waste. The amount of methane from landfill gas produce more than twice than the combustion procedure. Also, most of the waste is biomass or originated biologically. There are 2 methods to determine the biomass fraction from waste fuels. The first one is through the radiocarbon dating and balance method. There are previous methods that were developed which are the selective dissolution method and manual sorting. There are actually several methods that were created before but they used the alternative method (radiocarbon dating and balance method) because the initial two has limitation.

Radiocarbon dating is also known as Carbon 14 where it can determine the biomass fraction waste precisely and the biomass calorific value. The balance method is the calculation of the most possible result and provides existing data on materials like the composition. Also the operating conditions of the plant for Waste to Energy. There are 431 Waste to Energy plants in Europe for the year 2005 and United States has 89 in 2004 according to ISWA According to ISWA or the International Solid Waste Association. Edmonton Municipal Waste-to-Ethanol gasification Plant is one example of WtF plants.

The following are some examples of waste incineration for Waste to Energy plants:

Dickerson Maryland – Montgomery County Resource Recovery Facility (1995)

Vienna Austria – Spittlau and Fl

As per the recorded evidence, wind power generation first took place about a century ago. During that time it was primarily used for grinding flour and pumping water. The very first structure of windmill was found in a place near Persia. These windmills were arguably the first machines used for harnessing the energy from wind. The experts believe that the windmill concept spread to parts of Europe and then to America, from this place near Persia. However, Netherlands was the first European country to come out with the structure of modern windmill. The sophisticated technology behind the windmill then began to spread in the European continent; most of the countries in Europe welcomed it, and made necessary changes based on their requirement.

However, modern researchers have made a very good point on the wind power history. They credit the sailboats for first using the power of wind energy. And they have enough evidence on their side to prove the point. It is important to know in this context that the ancient sailboats made their sails from animal hides. No doubt these sails were heavy, but they perfectly utilized the wind and its direction for guiding the boats. Bigger sailboats, and ultimately ships evolved from them. Modern ships later used the law of Magnus effect for harnessing wind energy in their favor.

American windmills started to show up in the middle of nineteenth century. They have played a significant role in wind power history. The Aermotor and Dempster designs were extremely popular at that time. However, it is really surprising that some of these ancient models still do exist in America. A visit to these sites will certainly rekindle the memory of ancient lifestyle as depicted in the history books. It is a wonder how mankind has evolved from that stage, and is now at the moment using the Magnus effect for the purpose of full utilization of wind energy. However, just like in Europe, the American windmills were also utilized for the maintenance of cattle and for farming.

From 1851 to 1971, nearly about 6,000,000 windmills were built in America. This just goes to show you how popular the concept of windmill became during those days. By the end of 19th century, windmills with the potential of producing electricity were discovered. This is a discovery for which the entire human race can be proud of. This discovery has also paved the way for some other interesting devices propelled by wind energy. The growing usage of wind energy is certainly a step forward towards a pollution free world.

The first thing you will want to do is figure out what it is that you need the DC voltage to power. How important is the DC input voltage to the circuit or the device that you to need to have powered? Most circuits or devices that you buy will have voltage protection that is built into the circuit. For instance if it requires a 6VDC input then the range that is acceptable could actually be five to eight volts of DC. Make sure to check the specs for the input voltage before you do anything.

Next you need to figure out the maximum load that your circuit will need for it to operate. The power rating that you will find for the AC to DC power supply will need to exceed the actual maximum DC power consumption of it’s circuit. You can figure out the total load or current of these components on the circuit by figuring out the maximum load rating for all of the items, like motors, servos, lights, resistors and so on. If you happen to buy a circuit that is already manufactured or an electric device the DC load is going to be in Amps and will be identified on the item already. To figure this out on your own you need to use the Ohm’s law which is I=V/R or the current equals the voltage that is divided by the resistance.

There are four different main power supplies for AC to DC. These physical types will include circuit boards, brick like switching power supplies, plugs in the wall and then of course power cords with the AC to DC adapter box. If you are keeping the electronics in one box then use a circuit board or a brick like switching. If you are going for a smaller electronic device then use a wall plug or a power cord.

Next you will need to pick the power supply output. The different types are unfiltered or linear, filtered or linear, as well as regulated or switching. The unfiltered are the least expensive of the output power supplies. The regulated ones are sometimes already built into the designs but the others aren’t. The filtered ones are the best because they are designed to be able to actually remove some of the higher frequency noise that can come from a power input.

The switching or regulated supplies are also better because the IC uses a pulse width modulation to do the regulating the output voltage. They usually will have better output than the wall plug or the power cord. This type of power supply will also regulate the output of the voltage under a variety of different loads.

Understand that if the power supply doesn’t give your device enough current that the device could actually be damaged. Also remember that it is extremely dangerous to work with electricity so be especially careful when doing so.

If you want to find a good overview of the different sources of energy you can get information from the Department of Energy. They have a list of things a long with information about the energy sources such as solar, wind, geothermal as well as biomass. You should have at least a general understanding and knowledge about all of these different resources before making a decision.

You will also need to set down some goals. You really need to be clear on why you are looking for an alternative energy source and how you want to use it. By having this kind of goal it is going to help shorten your search.

What is your motivation? Are you trying to simply lower your electric, gas or oil bills on a monthly basis? Or is the reason that you want to help save the environment so you may not mind actually spending more on energy if it helps out the environment in which you live? Remember, that the cost of adding a new source of energy to your home can cost in the hundreds to tens of thousands of dollars to accomplish. So, you really need to know why you are doing this.

If your only goal is to help the environment then the choice shouldn’t be too hard, however, if that is not the case then you need to start shortening your options by comparing how much it will cost to invest in the new source of energy as compared to how much you will eventually save. You need to know if your return on the investment is going to be worth the money you may or may not be saving each month.

After you have done this you need to make sure that there are no zoning regulations with regards to the type of energy you might be considering. Don’t just think because something is good for the environment that it’s going to be allowed in your area. Anywhere you live may have regulations that you much follow. Especially if you live in a condo community or some other type of controlled community situation.

Once you have decided on what you want and that there are no regulations to worry about you need to start comparing the different products and make sure that the equipment that you are considering on buying is of high quality. Make sure that you check out the vendor or the contractor that you might be considering to work with. Just check with the BBB or Better Business Bureau. See if there are any black marks against them and find out how others feel about their products and work.