Behold, the power of shale:
http://www.washingtonpost.com/natio...c787da-e7ca-11e1-9739-eef99c5fb285_story.html
PITTSBURGH In a surprising turnaround, the amount of carbon dioxide being released into the atmosphere in the U.S. has fallen dramatically to its lowest level in 20 years, and government officials say the biggest reason is that cheap and plentiful natural gas has led many power plant operators to switch from dirtier-burning coal.
Many of the worlds leading climate scientists didnt see the drop coming, in large part because it happened as a result of market forces rather than direct government action against carbon dioxide, a greenhouse gas that traps heat in the atmosphere.
Michael Mann, director of the Earth System Science Center at Penn State University, said the shift away from coal is reason for cautious optimism about potential ways to deal with climate change. He said it demonstrates that ultimately people follow their wallets on global warming.
Theres a very clear lesson here. What it shows is that if you make a cleaner energy source cheaper, you will displace dirtier sources, said Roger Pielke Jr., a climate expert at the University of Colorado.
In a little-noticed technical report, the U.S. Energy Information Agency, a part of the Energy Department, said this month that total U.S. CO2 emissions for the first four months of this year fell to about 1992 levels.
A frenzy of shale gas drilling in the Northeasts Marcellus Shale and in Texas, Arkansas and Louisiana has caused the wholesale price of natural gas to plummet from $7 or $8 per unit to about $3 over the past four years, making it cheaper to burn than coal for a given amount of energy produced. As a result, utilities are relying more than ever on gas-fired generating plants.
Both government and industry experts said the biggest surprise is how quickly the electric industry turned away from coal. In 2005, coal was used to produce about half of all the electricity generated in the U.S. The Energy Information Agency said that fell to 34 percent in March, the lowest level since it began keeping records nearly 40 years ago.
http://www.washingtonpost.com/natio...c787da-e7ca-11e1-9739-eef99c5fb285_story.html