Back to the future? Past global warming period echoes today's

Banded sedimentary rocks in the Willwood formation in Wyoming The rate at which carbon emissions warmed Earth's climate almost 56 million years ago resembles modern, human-caused global warming much more than previously believed, but involved two pulses of carbon to the atmosphere, researchers have found.The findings mean that the so-called Paleocene-Eocene thermal maximum, or PETM, can provide clues to the future of modern climate change. The good news: Earth and most species survived. The bad news: It took millennia to recover ... More at http://www.nsf.gov/news/news_summ.jsp?cntn_id=133603&WT.mc_id=USNSF_51&WT.mc_ev=click
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