Global Warming Going Back to the Cambrian Era

Global Warming Going Back to the Cambrian Era
Global Warming Going Back to the Cambrian Era

Scientists at the Department of Energy’s Lawrence Berkeley Laboratory have produced a geological record of global temperatures going all the way back to the Cambrian Era. The left-hand portion of the graph is high truncated and represents millions of years before the present. It was generally a very warm globe until the Pliocene 5 million years ago when things began to cool down. (This was also the period when the first humans emerged on the savannahs of East Africa.) That was followed by a series of Ice Ages during the Pleistocene until an era of climate optimism emerged about 10,000 years ago. (There has been speculation that the emergence of human farming had something to do with this. Since then temperatures have stayed within a fairly narrow range, with the “Little Ice Age” of the 16th-18th centuries as a slight aberration. In the past 50 years temperatures have headed up again, slightly out of that range, which the Berkeley Lab says is the evidence of global warming. http://www.forbes.com/sites/jamesconca/2015/02/27/surprise-co2-directly-linked-to-global-warming/?ss=energy

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