3 Million Years in the Making
May 11, 2013
It is a development that will be remembered for ages – perhaps the next 3 million years – on May 2nd, atmospheric CO 2 levels rose beyond a monumental 400 parts per million – such a level has not existed since 3 million years ago – before the human race, or any of its predecessors had evolved. The graph alongside shows the steep rise of CO 2 levels in the last few hundred years.
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