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Compared to the environmental impact of traditional energy sources, the environmental impact of wind power is relatively minor, slightly higher than the environmental impact of hydro power on a life-cycle basis. Unlike electricity derived from fossil fuel-powered generating plants, wind power consumes no fuel and emits no air pollution in operation. As well, wind power consumes no fuel in operation, unlike nuclear power plants which do.

the wind turbine collects kinetic energy from the wind and transfers it to the generator. The blades on the turbine turn as the wind blows. As these blades move, they rotate a shaft connected to the rotor of a generator. The spinning magnets of the generator convert that rotational energy into electricity.

1 MW of wind energy can offset approximately 2,600 tons Waste heat recovery  file size 4MB of carbon dioxide annually.

29,440 Megawatts (MW) of wind energy are currently installed in the United States, and an additional 5,866 MW are under construction.Over 8,500 MW were installed in the US in 2008 (just beating out China with 6,300 MW). This represents: 50 percent increase from 200742 percent of all new generating capacity installed in 2008$17 billion investment44 million tons of carbon emissions avoided (equivalent of 7 million cars)35,000 new jobs

Solar energy is energy from the sun, it is a renewable source of energy and does not cause pollution.

Tidal power traditionally involves erecting a dam across the opening to a tidal basin. The dam includes a sluice that is opened to allow the tide to flow into the basin; the sluice is then closed, and as the sea level drops, traditional hydropower technologies can be used to generate electricity from the elevated water in the basin. Some researchers are also trying to extract energy directly from tidal flow streams.

Another form of ocean energy is called tidal energy. When tides comes into the shore, they can be trapped in reservoirs behind dams. Then when the tide drops, the water behind the dam can be let out just like in a regular hydroelectric power plant.

Currently, most hydrogen is made from natural gas through a process known as reforming. Reforming separates hydrogen from hydrocarbons by adding heat. Hydrogen can also be produced from a variety of sources including water and biomass.

Essentially wind turbines were made first between 500-900 A.D. by the Persians and were used as a water pumping system

Tidal energy is a form of hydropower that converts the energy of the tides into electricity or other useful forms of power. The tide is created by the gravitational effect of the sun and the moon on the earth. Tidal energy is therefore a predictable form of renewable energy, which can be harnessed in two forms:

April 4, 2008 Bristol based renewable energy company Marine Current Turbines has completed the first installation phase of the 1.2MW SeaGen Tidal System at Northern Ireland’s Strangford Lough - a site chosen for its combination of fast tidal current and ability to provide shelter from bad weather which may hinder the construction process.

It is an energy source that is considered renewable because both rain and heat in the earth replenish themselves naturally.

Ocean waves are generated by wind passing over the surface of the sea - a process which often begins many hundreds or thousands of miles from shore.

The U.S. currently produces 9.2 billion gallons of ethanol a year and consumes 9.6 billion gallons.

With a key federal tax incentive about to expire, the U.S. installed a 5.5 gigawatts of wind power in December to cap off a year that saw a record 13.2 gigawatts of wind energy come online, according to a report released Friday by research firm Bloomberg New Energy Finance. The U.S. now boasts a total of 60 gigawatts of wind energy, accounting for 6% of the nation’s total generating capacity. According to Bloomberg New Energy Finance, wind power prices have dropped more than 21% since 2010. Falling prices and the looming expiration of the production tax credit, which pays a premium for wind energy, unleashed a wind farm building boom last year. “It’s clear that the economics, aided by the PTC, drove wind growth in 2012,” Amy Grace, a wind analyst with Bloomberg New Energy Finance, said in a statement. “Eleven gigawatts of capacity was built in states without any near-term state mandated demand.

The fossil fuels are then burned to heat water.

Carbon dioxide contributes to global warming by absorbing heat energy from the earth, trapping it and preventing its release into space.

The Transesterification process is the reaction of a triglyceride (fat/oil) with an alcohol to form esters and glycerol

Unless soybean oil prices decline dramatically, it does not appear that biodiesel can be produced in large quantities at a cost that is competitive with petroleum diesel

Biodiesel from soybeans costs an estimated $2 to $2.50 per gallon to produce. Biodiesel from yellow grease is about $1 a gallon cheaper, but the available supply in the U.S. is much smaller – enough to make 100 million gallons per year. Producers of biodiesel from pure vegetable oil are eligible for a federal excise tax credit of $1 for every gallon blended with conventional diesel. Biodiesel from used cooking oil earns a credit of 50 cents per gallon.