- The 1970-2010 global warming rate of 0.18°C/decade is predicted to increase to at least 0.27°C/decade during the few decades after 2010, new research finds. As a result, the 1.5°C global warming level will be passed this decade and the 2°C level will be passed within the following two decades. https://academic.oup.com/oocc/article/3/1/kgad008/7335889?searchresult=1 2 comments science