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First of all, harnessing geothermal energy does not have the devastating impact on climate change like burning of the fossil fuels does. It is true that fluids drawn from the earth's core include greenhouse gases such as carbon dioxide and methane, but the amount of released greenhouse gas emissions is negligible compared to those from fossil fuel fired power plants.

One of the reasons for this is the fact that geothermal power plants are equipped with emission-control systems that reduce the exhaust.

geothermal power plants are connected with minimal freshwater and land requirements. This means that geothermal energy commonly has minimal impact on nearby ecosystems.

But, on shore ocean wave energy generators will occupy extended lengths of coastline. And most of the coastlines of the world that have significant wave activity are either highly desired residential areas, or they are pristine wilderness.

Ocean wave energy is still in the development stages but it is already apparent that its impact on the environment could be relatively high compared to other renewable energies.

It is noteworthy that even these environmental impacts are far less than those of most fossil fuel plants.

For billions of years, the sun has poured out huge amounts of energy in several forms, including light, heat, radio waves, and even x-ray. The Earth, in orbit around the sun, intercepts a very small part of the sun’s immense output. On Earth, direct sunlight is available from sunrise until sunset, except during solar eclipses. Solar collectors and modules are designed to capture some of the sun’s energy and change it from radiation into more usable forms such as heat or electricity. In fact, sunlight is an excellent source of heat and electricity, the two most important forms of energy we consume.

It’s like buying vs. renting a home. Over the next 10 years a typical homeowner or small business will pay $18,000 to over $50,000 in electric bills, at rates that often increase faster than inflation. When you choose a Bergey wind system you take the same monthly expense and invest it in a tangible asset. Once your Bergey turbine is paid off, you will enjoy more money in your pocket every month for the next 20 – 40 years. Tax credits and rebates make it affordable. Small wind turbines qualify for a 30% federal tax credit and, for businesses, accelerated depreciation.  USDA grants are available for farmers, ranchers, and rural businesses.  Many states offer additional incentives (see www.dsireusa.org).  These incentives make owning a Bergey wind turbine surprisingly affordable.

Geothermal electricity generation does involve a small amount of geothermal pollution in that the steam coming up from below ground carries some toxic gases, but in most plants these gases, as well as the steam, are condensed and reinjected into the ground so the effect on the environment is negligible. There are no CO2 emissions from geothermal energy so it is a much better source of electricity than coal or natural gas or nuclear (or even large-scale hydro generation which requires the flooding of large areas of land).

Geothermal electricity generation does involve a small amount of geothermal pollution in that the steam coming up from below ground carries some toxic gases, but in most plants these gases, as well as the steam, are condensed and reinjected into the ground so the effect on the environment is negligible. There are no CO2 emissions from geothermal energy so it is a much better source of electricity than coal or natural gas or nuclear (or even large-scale hydro generation which requires

Geothermal electricity generation does involve a small amount of geothermal pollution in that the steam coming up from below ground carries some toxic gases, but in most plants these gases, as well as the steam, are condensed and reinjected into the ground so the effect on the environment is negligible. There are no CO2 emissions from geothermal energy so it is a much better source of electricity than coal or natural gas or nuclear (or even large-scale hydro generation which requires the flooding of large areas of land).

All renewable energy (except tidal and geothermal power), and even the energy in fossil fuels, ultimately comes from the sun. The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour.

The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour.

The Solar Cells and Solar Panels that are needed to harness solar energy tend to be very expensive when you first purchase them.

Solar powered panels and products are typically extremely easy to install

Most of the wind energy produced  for power needs comes from wind farms, great big windmill type contraptions produce electricity because as the wind blows it turns the blades on a shaft, which powers a generator.

Wind energy is mechanical energy, the rotating movement of the blades of the windmill produces electricity through a generator. The wind is formed by the heating and cooling effects of the suns rays, the air rotates in high and low pressure which generates wind. Depending  on the type of wind pressure that is generated,whether it is a cool breeze on your face, different capacity of the strength of wind is formed in different parts of the world, this power goes to producing an effective source of untapped energy, for use by us in the form of heating and lighting.

The constant temperature of the Earth creates underground sources of heat, hot water and steam which become fuel to produce geothermal energy. People have used various forms of geothermal energy for hundreds of years; modern technology accesses these underground reservoirs, steam deposits and hot air by drilling, and then using the heat or hot water directly or using it to create power. Geothermal energy represents an enormous, underused power source that provides clean, renewable energy in virtually unlimited supply.

Tidal power is a means of electricity generation achieved by capturing the energy contained in moving water mass due to tides. Two types of energy can be extracted: kinetic energy of currents between ebbing and surging, and potential energy from the difference in height (or head) between high and low water marks.

Tidal power schemes do not produce energy 24 hours a day. A conventional design, in any mode of operation, would produce power for 6 to 12 hours in every 24 and will not produce power at other times

Wind is a clean source of renewable energy that produces no air or water pollution.

Wind is the movement of air from an area of high pressure to an area of low pressure. In fact, wind exists because the sun unevenly heats the surface of the Earth. As hot air rises, cooler air moves in to fill the void. As long as the sun shines, the wind will blow. And as long as the wind blows, people will harness it to power their lives.

The wind spins the blades, which turn a shaft connected to a generator that produces electricity. Other turbines work the same way, but the turbine is on a vertical axis and the blades look like a giant egg beater.

Using the sun's power has been around as early as the 7th century B.C. when people were using it to build fires. It is hypothesized that in 2nd century B.C. Archimedes used the reflective surfaces of bronze shields to burn ships invading Syracuse. However, it was not until 1973 when the Greek navy actually experimented with the notion and successfully burned a wooden ship at 50 meters. Sunrooms were common in houses and public buildings in the 6th century A.D. These were so common that "sun rights" were given to individuals. Swiss scientist Horace de Saussure was credited with building the world’s first solar collector in 1767. For a more descriptive timeline, this timeline lists the milestones in the historical development of solar technology from the 7th century B.C. up to today.

Using the sun's power has been around as early as the 7th century B.C. when people were using it to build fires. It is hypothesized that in 2nd century B.C. Archimedes used the reflective surfaces of bronze shields to burn ships invading Syracuse. However, it was not until 1973 when the Greek navy actually experimented with the notion and successfully burned a wooden ship at 50 meters. Sunrooms were common in houses and public buildings in the 6th century A.D. These were so common that "sun rights" were given to individuals. Swiss scientist Horace de Saussure was credited with building the world’s first solar collector in 1767. For a more descriptive timeline, this timeline lists the milestones in the historical development of solar technology from the 7th century B.C. up to today.

Because wave energy needs only 1/200 the land area of wind and requires no access roads, infrastructure costs are less;

Biodiesel is considered a non-flammable and non-combustible product.

Optimally, dedicated biodiesel tanker trucks and associated transfer components should be used to transport biodiesel. If non-dedicated equipment is used, it must be washed, rinsed, drained and dried prior to biodiesel loading in order to avoid any cross-contamination.

Solar PV (photovoltaic) was first discovered in 1839 by French scientist Edmond Becquerel. Over the next 100 years, there were other discoveries and inventions, including several discoveries by Albert Einstein, who received a Nobel Prize for his theories on the photovoltaic effect in 1921.

Solar PV (photovoltaic) was first discovered in 1839 by French scientist Edmond Becquerel. Over the next 100 years, there were other discoveries and inventions, including several discoveries by Albert Einstein, who received a Nobel Prize for his theories on the photovoltaic effect in 1921.

Wind power is generated by moving air. As the sun heats the land, the air above also warms and rises. Cold air then replaces the rising air. This creates the winds that we feel most days of the year.

If you visit the seaside or coastal area you will probably find that the weather is more breezy or windy than inland. This is because the warm air rises over the land and cold air over the sea replaces it.

Current estimates for an entire system, including fuel and air supply, insulation, fuel cells stack, reformer and desulfurizer, piping, labor, depreciation, system control and power electronics is as high as $4000 per kW [20].