Wind turbines are responsible for the deaths of between 10,000
and 40,000 birds each year, according to the American Bird
Conservancy.
the Altamont Pass site kills the largest number of birds -
about 4,700 each year
The American Wind Energy Association contends wind turbines are
far less lethal to birds than other man-made structures, such as
windows (responsible for more than 100 million deaths each year in
the U.S.) and power lines (between 130 million and 174 million), or
than cats, which remain the number one bird killer.
In the early days of motorized transport, fuels derived from plants lost out to fuels refined from crude oil
first-generation biofuels -- chiefly, ethanol made from corn or sugar cane, or biodiesel made from vegetable oil
The source plants absorb carbon dioxide from the air as they are growing, and consequently, the carbon dioxide that is released when biofuels are burned does not represent a net addition of that greenhouse gas to the atmosphere.