EarthEx-sceptic says humans to blame for global warming Physicist Richard Muller now says he is convinced that humans are causing climate change, but nobody is convinced by his analysis ¿ìè¶ÌÊÓÆµ
EarthEarth's past warmth is no get-out clause Climate change deniers will seize on the discovery of a warm period 2000 years ago, yet the finding strengthens the case for human-made global warming Opinion