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Analysis
The prognosis on the climate isn't good - but the doctor's changing his bedside manner with the people in charge of the planet's health.
The report's chair, Dr Chris Field, is worried that an apocalyptic tone will frighten politicians so much that they'll abandon the Earth to its fate.
There is nothing inevitable about the worst impacts on people and nature, Dr Field says. We can cut emissions to reduce the risks of catastrophe and adapt to some changes that will inevitably occur.
We have to re-frame climate change as an exciting challenge for the most creative minds.
Cutting local air pollution from, say coal, can also reduce carbon emissions that cause warming; creating decent homes for poor people in countries like Bangladesh can improve lives whilst removing them from the path of flood surges.
Some will criticise Dr Field for being too upbeat. But many politicians have gone deaf to the old-style warnings. Maybe it's worth a new approach. bbc
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