This might be the only place In New York City where you can run barefoot on grass in the middle of February. Photo by Karen Blumberg.

April saw a rise in car sales of small and fuel-efficient vehicles, the New York Times reports. Photo by Stephie189.

Social influences impact decisions to buy electric vehicles, study finds. Photo by Kevin Krejci.

Japanese and U.S. companies team up on smart grid project in Maui, Hawaii. Photo by Marks Jonathan.