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solar energy is environmentally safe and does not contribute to pollution, acid rain, global warming, or smog. it is very dependable and lasts as long as the sun does-a couple billion years.

owa ranks 2nd in the nation for wind energy production as there are almost 2,900 utility scale wind turbines in Iowa.  This creates enough electricity to power 1,000,000 homes. Minnesota is fourth in the nation for wind energy production and Wisconsin is 19th.

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 BLM manages 20.6 million acres of public lands with wind potential. The BLM has authorized 39 wind energy development projects, including connected-action projects that include electric transmission support authorizations, with a total approved capacity of 5,557 megawatts, enough to supply the power needs of over 1.5 million homes. 

For more than a decade, wind energy has been the fastest growing energy technology worldwide, achieving an annual growth rate of over 30%. In the United States, the current total installed capacity is over 60,000 megawatts of wind projects.

Geothermal energy is essentially free heat that comes from under your feet,

Additionally, the generation of geothermal energy in the U.S. is enough to power over two million homes.

"The industry is growing now, because over the past decade both the federal and state government have put in place laws and policies to really promote clean energy".

Almost all biofuels used today cause more greenhouse gas emissions than conventional fuels if the full emissions costs of producing these “green” fuels are taken into account,

solar energy exhibits the "fastest growth," providing "more than 10% of global electricity by 2050." The IEA further found that in high renewable scenarios, solar is essential due to its "almost unlimited potential":

At the American Enterprise Institute's blog, Kenneth Green promoted a press release claiming that "Solar cells do not offset greenhouse gases" because solar cell production emits gases that "make carbon dioxide (CO2) seem harmless."

If hydrogen extraction is performed using electricity from a coal-driven power plant, it doesn't matter that the fuel cell doesn't pollute because the pollution occurred when the hydrogen was extracted. If hydrogen is to be a true nonpolluting power source, the electricity used to extract the hydrogen will need to be produced by a nonpolluting method such as solar power.

Verdant Power founders are planning to install up to 30 turbines with the total capacity of 1MW in the East Channel of the East River, writes The Day news portal.

Verdant Power is among the first companies that are exploring the potential of the tidal energy. Unlike the wind and solar power, tidal power is predictable as the tides move in correlation with the movement of the moon

The initial costs for the development of this technology are high. The company has raised USD 35 million so far and needs USD 25 million more.

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.

Tidal power, often referred to as tidal energy, is a type of hydropower that harnesses the energy of our ocean’s tides or other flowing waterways to produce power, usually in the form of electricity.  As sea levels rise and fall or the currents flow underwater a potential energy is created.  By using equipment such as tidal energy generators and underwater turbines in areas of high tidal movements, the kinetic motion of the ocean can be used to turn the turbines, thus producing electricity. 

The terms 'wind energy' describe the procedure by which wind is employed to produce mechanical power or electricity.

Light striking a silicon semiconductor causes electrons to flow, creating electricity. Solar power generating systems take advantage of this property to convert sunlight directly into electrical energy.

Europe has a long history of employing tidal forces to generate power, and tide mills dating back to the Middle Ages can be found across the continent. A dam with a sluice was constructed spanning a tidal inlet, or a section of a tidal estuary was turned into a reservoir.

When water flows toward the shore with the incoming tide, it flows through a tidal energy system, turning a turbine that generates electricity. When the tide shifts and flows in the opposite direction, away from shore, the tidal energy system again captures the energy with a turbine and converts it into electricity.

An important source of alternative energy is hydropower: converting the flow of rivers and ocean waves and tides into electricity through dams and turbines. The best part about both of these water sources is that they’re 100 percent renewable.

Solar energy is an infinitely renewable resource that uses the sun's rays to generate electricity for use in your home. By going solar, you can reduce your energy costs and lower your dependence on fossil fuels, thereby making your own contribution to a cleaner environment. Generally, the solar energy systems we use work as follows: