That's the basic conclusion from the latest report from the Intergovernmental Panel on Climate Change (IPCC). If we want to keep global warming to 1.5 Celsius above per-industrial levels (a goal set by the Paris Agreement in 2016) we will need to cut our emissions in half before 2030 and go carbon neutral by 2050. The report then lays out some of the stark consequences of not doing that such as communities and even some entire nations drowned by rising sea level, food shortages caused by prolonged droughts, and more frequent or intense natural disasters such as tropical storms and fires. Given what little we have so far done to avert disaster, even many optimistic people see those warnings as a fait accompli at this point. It still doesn't have to be. But perhaps more pragmatically, we need to act now to prevent things from getting even worse.
Read the report here: http://www.ipcc.ch/report/sr15/
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