Climate US map

The 2015 U.S. Clean Tech Leadership Index tracks and ranks the clean-tech activities of all 50 states and the 50 largest metro areas in the U.S.—from electric vehicles and renewables adoption to patent and investment activity. Those who download the report can see how their state and city rank. The Index is a valuable tool for the Energy Foundation—a MacArthur grantee and supporting partner of the report—to help analyze clean energy markets.