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    Sci Tech

Switch to natural gas in U.S. drops C02 levels to 20-year low

Drilling a horizontal shale gas well in Appalachia

Drilling a horizontal shale gas well in Appalachia

C02 emissions are the lowest in 20 years in the U.S. thanks to consumers and businesses switching to cheaper natural gas from dirtier coal.

“There’s 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.

Shale drilling and fracking are mostly responsible for the price decrease.

Environmentalists say that fracking pollutes underground drinking supplies.

Globally, C02 levels of carbon dioxide are rising not falling, especially in China.

But what are the alternatives?

Wind energy only supplied only 3 percent of the U.S. electricity for 2011, and even less was made from solar power.

“Installation of new renewable energy facilities has now all but dried up, unable to compete on a grid now flooded with a low-cost, high-energy fuel,” two experts from Colorado’s Renewable and Sustainable Energy Institute said in an essay posted this week on Environment360, a Yale University website.

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