BBC: CLimate Change
One degree may not sound like much, but, according to the IPCC, if countries fail to act, the world will face catastrophic change - sea levels will rise, ocean temperatures and acidity will increase and our ability to grow crops, such as rice, maize and wheat, would be in danger.
If we add up all the promises to cut emissions made by countries that have signed the Paris climate agreement, the world would still warm by more than 3C by the end of this century.
The countries emitting the most greenhouse gases by quite a long way are China and the US. Together they account for more than 40% of the global total, according to 2017 data from the European Commission's Joint Research Centre and PBL Netherlands Environmental Assessment Agency.
https://www.bbc.com/news/science-environment-46384067
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