For as long as we can remember, America has been leading the charge against global warming. Al Gore was traveling the country laying out the case for fewer emissions and Barack Obama was promising a new chapter in the fight against climate change.
But at yesterday's Rio+20 Earth Summit, the President was conspicuously absent. And with the world economy taking up all the front pages, global warming has taken a back seat. Following this trend is Andrew Revkin, environmental reporter for our partner the New York Times and author of the Dot Earth blog. Paulo Cabral, BBC Brazil reporter, is at the Rio+20 Summit.