'Bingo!' Wasted energy from cities explains a global warming mystery - Science

http://science.nbcnews.com/_news/2013/01/27/16702236-bingo-wasted-energy-from-cities-explains-a-global-warming-mystery?lite
Heat that escapes into the atmosphere from the energy used to warm homes, drive cars and run factories is altering the jet stream and causing wintertime temperatures to rise in remote, sparsely populated stretches of the Northern Hemisphere, according to a new study.