Prix Pictet 2012 shortlist – in pictures

The shortlist for the Prix Pictet, the award devoted to photography and sustainability, features an array of talent on the theme of ‘power’. UK photographer Edmund Clark explores Guantánamo Bay, Robert Adams takes a stark look at deforestation in the US north-west, and Azerbaijan artist Rena Effendi finds the elderly people still living in Chernobyl’s ‘zone of alienation’. Here is a selection of the images in the running