Billions of dollars and much time spent to fight two thirds of a degree

The rate at which Earth’s atmosphere is warming has not significantly accelerated over the past 23 years, according to research at The University of Alabama in Huntsville (UAH)...Mathematically removing the natural but transient climatic effects of volcanoes and El Niño/La Niña Pacific Ocean warming and cooling events leaves an underlying climate trend, all or some part of which might be attributed to human causes — including enhanced greenhouse forcing caused by rising levels of CO2 and other manmade greenhouse gases in the atmosphere.  At present, however, there is no accepted tool or technique for confidently estimating how much of the warming in the past 38+ years might be due to natural causes...
The unadjusted climate trend in the deep troposphere from January 1979 to June 2017 was +0.155 C (about 0.279° F) per decade.  After adjusting for the volcanoes and other less significant effects, including the Atlantic multi-decadal oscillation and the Pacific decadal oscillation, the trend drops to 0.096 C per decade — or about 0.364 C (0.66° F) total since December 1978.