Extinction rates are very hard to measure but the background rate - TopicsExpress



          

Extinction rates are very hard to measure but the background rate – the rate at which species would be lost in the absence of human impacts – is something like ten a year per million species. Current extinction rates are anywhere between 100 to 1000 times higher than that. We are possibly in the middle of one of the great mass extinctions in the history of life on Earth. - iflscience/environment/humanity-existential-danger-zone-study-confirms-1
Posted on: Mon, 26 Jan 2015 07:36:19 +0000

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