US planes emit less greenhouse gases, despite flying more
13 May 2008

The US aviation industry has cut its greenhouse gas emissions by 13 per cent since 2000, even as the amount of flying has reached record levels, government data shows.
The decline was among the steepest of any sector measured by the Environmental Protection Agency and came as total US emissions of gases that warm the Earth remained level between 2000 and 2006.
... login or subscribe for full story