The study, by 1,360 experts in 95 nations, said a rising human population had polluted or over-exploited two thirds of the ecological systems on which life depends, ranging from clean air to fresh water, in the past 50 years. Ten to 30 percent of mammal, bird and amphibian species were already threatened with extinction, according to [...]
The study, by 1,360 experts in 95 nations, said a rising human population had polluted or over-exploited two thirds of the ecological systems on which life depends, ranging from clean air to fresh water, in the past 50 years.
Ten to 30 percent of mammal, bird and amphibian species were already threatened with extinction, according to [...]
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