If we cut CO2 and methane emissions over the next 20-30 years, then we will limit the rise in global temperature to 2.2 degrees (currently 1 degree, plus 30 years of 0.2 degrees per decade, plus thermal inertia adding another 0.6 degrees after that.) If we do not, the possibility of strong positive feedbacks increases and we risk moving into the catastrophic warming part of this chart. The 1 degree rise we have had to date has already produced severe side-effects. 2.2 degrees will create even more, and not in a linear but and exponential way. And it just gets worse after that.
Global temperatures are rising by 0.2 degrees C per decade. Every decade we delay makes the ultimate rise worse.
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