An official website of the United States government.
We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.
How clean is the electricity you use? Find out >>
Learn about methods and tools analysts can use to quantify and compare the many benefits of energy efficiency and renewable energy policies and programs.
The Heat Island Reduction Program’s recently enhanced green roofs webpage includes the costs and benefits of green roofs, refreshed graphics, and a photo gallery of projects.
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