At the 2015 United Nations Climate Change Conference in Paris, countries set goals that require halving carbon emissions by 2030. In a new piece in Nature, Professor Harald Winkler, as part of an international team, delivers the bad news that the emissions gap - between what countries pledged to then and what needs to be done now - is growing. He also points to small signs of hope that the climate crisis can still be addressed.
1. How much has the emissions gap grown by? How was this established?
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