How to divide up carbon budgets fairly

Assuming the world does agree to the 1400-gigatonne CO2 budget, should we base the remaining 'spend' on today's shares of total emissions – China gets 24%, the America 14%, etc? Two studies suggest there are fairer ways.

Carbon Brief

Our remaining 'carbon budget' means we can emit about 1400 gigatonnes of carbon dioxide and still have a 50-50 chance of staying below 2 degrees, scientists at the Intergovernmental Panel on Climate Change say.

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