A combination of acidifying seas, coral death and Arctic melting means that entire marine food chains could collapse. On land, rainforests may retreat, rivers fail and deserts spread. Mass extinction is likely to be the hallmark of our era. This is what success, as defined by the cheering delegates, will look like.And failure, even on their terms? Well that is plausible too. While earlier drafts specified dates and percentages, the final text aims only to “reach global peaking of greenhouse gas emissions as soon as possible”. Which could mean anything and nothing.

With 2C of warming, large parts of the world’s surface will become less habitable. The people of these regions are likely to face wilder extremes: worse droughts in some places, worse floods in others, greater storms and, potentially, grave impacts on food supply. Islands and coastal districts in many parts of the world are in danger of disappearing beneath the waves.

Source: Grand promises of Paris climate deal undermined by squalid retrenchments | Opinion | The Guardian

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