Read MoreRate of loss rose from 0.8 trillion tonnes per year in the 1990s to 1.3 trillion tonnes per year by 2017.Rate of loss rose from 0.8 trillion tonnes per year in the 1990s to 1.3 trillion tonnes per year by 2017.

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Read MoreRate of loss rose from 0.8 trillion tonnes per year in the 1990s to 1.3 trillion tonnes per year by 2017.Rate of loss rose from 0.8 trillion tonnes per year in the 1990s to 1.3 trillion tonnes per year by 2017.