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By Steven Wilmsen Globe Staff,Updated January 20, 2022, 12:01 a.m.
This is how long we have ignored warnings of a coming crisis:
It’s been more than half a century since a presidential panel under Lyndon Johnson found that fossil fuel emissions could be warming the earth.
It’s been 40 years since the National Academies of Sciences published a massive landmark study with similar conclusions.
And it’s been three decades — the span of an entire generation — since a NASA scientist named James Hansen sat before Congress and testified that human-caused global warming was not only real but “already happening now.”
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