Will Hutton: Earth might warm by .3C by 2100; also "The decades ahead will witness our planet become progressively uninhabitable for hundreds of millions of people, because of either drought or floods"

To fight climate change, we must trust scientific truth and collective action | Will Hutton | Comment is free | The Observer

It could be as little as 0.3C by 2100, the lowest boundary of one of four scenarios. Or it could be as high as 4.5C, the upper boundary of the highest scenario.
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This is terrifying. The decades ahead will witness our planet become progressively uninhabitable for hundreds of millions of people, because of either drought or floods. The weather will become ever more volatile. Ocean currents will be disturbed and dwindle. There will be mass movements of people trying to escape the consequences; no country will be untouched. We should act to minimise the risk.