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PostPosted: Fri Jun 02, 2017 5:57 pm 
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Quote:
May 31 (UPI) -- Analysis of ice cores, as well as historic health and economic records, suggests humans have been polluting the air for at least 2,000 years, challenging the assumption that environmental degradation began during the Industrial Revolution.

Researchers determined the natural concentration of lead in the air is close to zero. Ice cores show unnatural lead levels were detectable in the atmosphere several centuries before the Industrial Revolution.


http://www.upi.com/Science_News/2017/05 ... 496256147/

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When the last Muslim apologist is beheaded...it will be reported by the last remaining leftist journalist.


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