AP IMPACT: CO2 EMISSIONS IN US DROP TO 20-YEAR LOW

Related, closely, to my previous post: in most of the world coal is the cheapest source ...

AP IMPACT: CO2 EMISSIONS IN US DROP TO 20-YEAR LOW

"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.
"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."

Read the entire, informative, article at the Associated Press site