Humans caused climate change long before Industrial Revolution

http://www.newstrackindia.com/newsdetails/2012/07/04/312-Humans-caused-climate-change-long-before-Industrial-Revolution.html

London, July 4 (ANI): Developing countries like India and China have contributed more to global warming than previously thought, a new study suggests.

Researchers at the Washington-based Carnegie Institution for Science have discovered that the clearing of forests and other wild areas for agricultural purposes before the Industrial Revolution in 1840 added significant carbon dioxide to the atmosphere.

The paper concluded that just under ten percent of the 0.8C global warming experienced over the last 150 years is because of pre-industrial land use change.