New Developed Nations' Climate Targets Announced During Earth Week Summit - 2.4C Warming By 2100
New climate targets announced by the US and other rich nations in recent weeks have put the world on track for global heating of about 2.4C by – the end of the century, research has found. That is a 0.2C improvement on the previous forecast of 2.6C, but still substantially above the Paris goal of holding temperature rises to no more than 2C above pre-industrial levels, with an aspiration to limit heating to 1.5C.
Analysts have said the goals will still be within reach if key countries step up with better plans and if all countries bring forward new policies to meet their commitments.
The forecasts from the Climate Action Tracker are necessarily uncertain, but the figures give an idea both of the importance of the contribution by the US – the world’s second biggest emitter – and other rich nations in setting fresh emissions targets, and of how much more remains to be done to meet the Paris goals.
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This decade is regarded as crucial for climate action, because if emissions continue to rise for the next 10 years, as they have in previous decades, there will be little chance of holding temperature rises within the Paris limits, which represent the threshold of safety beyond which climate breakdown is likely to become catastrophic and irreversible. The Intergovernmental Panel on Climate Change has found that emissions should be roughly halved in the next 10 years, to avoid temperature rises above 1.5C.
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https://www.theguardian.com/environment/2021/may/04/rich-nations-climate-targets-will-mean-global-heating-of-24c-study