Greenpeace activists try to promote the use of renewable energy, using solar and wind power, on November 29, 2011 on the Durban beachfront. UN climate talks got under way on November 28 in Durban amid calls for action to head off worsening drought, floods and storms but also to fears of a bust-up just two years after a near-fiasco in Copenhagen. AFP PHOTO /ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)