This is the U.S. government agency responsible for the development and enforcement of environmental regulations; the group also conducts research and works to educate the public on environmental issues.
This is a sort of natural power plant. It's a group of many wind turbines located together in an area that gets steady wind (in open, rural spaces, near mountain passes, even in offshore locations). The turbines collect the wind's energy and convert it to electricity, which can then be sold to the local utility grid. Wind is a renewable, virtually pollution-free source of electricity.