Guardian: US president Obama sent a clear message about climate change during his acceptance speech. But will he and other world leaders finally take decisive action? Photograph: Alex Wong/Getty Images I hope I am wrong. But in 2013, we can expect to witness more devastating extreme weather events, fuelled and supercharged by the destructive power of a warming planet brought about by climate change. I hope to witness and be part of the exponential growth in popular pressure to force governments to take...