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Cap and trade
Cap and trade is a regulatory system that sets a government limit on overall emissions of pollutants like the heat-trapping gases scientists have linked to global warming -- the "cap." Each company gets a certain amount of credits or permits, beyond which companies cannot emit more pollution. It then allows utilities, manufacturers and other emitters to "trade" pollution permits, or allowances, amongst themselves.
On June 26, 2009, the U.S. House of Representatives passed a...
What are the visual impacts of wind farms?
Wind turbines used for large scale wind farms are grand and large scale structures. The towers run from around 50 meters to 90 meters high and the blades have roughly the same diameter. Therefore, their total size from the tower base to the tip of the rotors could add up to several hundred feet. Newer and larger rotors are being developed which are basically used for utility size wind farms. Turbines for private households, small scale businesses, or private farming are much smaller in size,...
How many homes does a wind farm power?
The ability to produce electricity is measured in watts. The output of a wind turbine is directly dependent on the turbine's size and the wind's speed via the rotor. Ranging from 250 watts to 5 megawatts (MW), wind turbines are now being manufactured with various power ratings.
Wind speed is the most important element in analyzing the turbines output. Primarily, a site's wind speed is measured together with other factors as part of a wind resource assessment before the construction of a...
The difference between on-grid wind farms and off-grid wind farms
With the growing need to discover and explore renewable and environmentally-friendly sources of energy, wind farms are an option many are opting for. With the many problems surrounding energy prices and usage of fossil fuels such as coal and oil, wind farms are now being developed in various parts of the world. With wind being a clean and inexhaustible source of energy, wind farms are a credible replacement for the otherwise standard energy generation processes i.e. coal, natural gas, oil and...
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