A man dressed as a polar bear stands ot the front of thousands of protesters at the "Walk Against Warming" march through the streets of central Sydney December 12, 2009. Thousands took to the streets of Australia's main cities on Saturday at the start of an international day of action to pressure the U.N. conference in Copenhagen for strong action on climate change, organisers said. REUTERS/Tim Wimborne
(AUSTRALIA - Tags: CIVIL UNREST ENVIRONMENT ENERGY POLITICS)