A shift from coal to natural gas for generating electricity contributed to a 1.5 percent drop in U.S. greenhouse gas emissions in 2006 as compared to 2005, according to an EIA report out today. We’re 15 percent above 1990.
update: from the comments, Andy Dessler, thoughtful academic that he is, actually reads the report:
The report says the drop was “due to favorable weather conditions; higher energy prices; a decline in the carbon intensity of electric power generation that resulted from increased use of natural gas, the least carbon intensive fossil fuel; and greater reliance on non-fossil fuels.”
Natural gas was part of this, but my reading of the report was that other factors were more important. In particular, it was a really, really hot winter and a slightly cool summer.