Christ the Redeemer statue is backdropped by Sugar Loaf mountain as the sun sets in Rio de Janeiro, Brazil, Thursday, May 10, 2012. The upcoming Rio + 20 conference, billed as a "historic opportunity" to build a greener future, appears to be going up in smoke. U.S. President Barack Obama likely won't be there, and the leaders of Britain and Germany have bowed out. The entire European Parliament delegation has canceled.