World-renowned photographer unveils his most ambitious project to date

Shot from the sky, the farmlands of northeastern Spain look like abstract paintings.

Arid landscape photos highlight man's problematic relationship with the environment

As environmental awareness increases, so too does the depletion of ecosystems and natural resources

Steven Cohen on the shift to a clean economy

Contenders for the 2011 Prix Pictet, the world's leading prize for environmental photography, to exhibit in Paris next month.