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carboncopy

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carboncopy

Re: vhgier post# 4119

Tuesday, 05/15/2012 6:21:55 AM

Tuesday, May 15, 2012 6:21:55 AM

Post# of 22426
Canary in a coal mine -- Miners kept caged canaries in the mines as an "early warning device." If the air was bad enough to kill the canary, it would soon be bad enough to kill people. The canaries were more sensitive to the deadly fumes. So their dying would warn the miners to get out. Today we sometimes use the expression in relation to environmental matters. If more vulnerable species are dying off, we could be next.

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