Images of an ecosystem in flux by wildlife photographer Paul Souders.

Artist Daniel Arsham explores the intersection of nature and architecture.

But wildlife conservation groups oppose the project, the New York Times reports.

From melting ice caps to volcanic hot springs, Roni Horn's art is inspired by Iceland's shifting landscape.

In Portland, a federal green building project takes shape.

U2 singer hums the polluter-pays tune in New York Times op-ed piece.