You'll soon be hearing lots about the "social cost of carbon" as Biden Administration updates estimates to inform regulatory policies (as described well here by @voooos --> https://www.sciencemag.org/news/2021/01/trump-downplayed-costs-carbon-pollution-s-about-change)

This is really going to be a debate about (mis)using RCP8.5 for political gain

The updated estimates of the "IWG in exile" shown in the figure in tweet just above come from this working paper --> http://www.impactlab.org/research/updating-the-united-states-governments-social-cost-of-carbon/

Read the fine print & what do we see?
RCP8.5 of course, as BAU no less

Ultimately, RCP8.5 may prove to be a key first test of scientific integrity under the Biden Administration

Climate policy is important
It is so important that good policy can be made based on robust science

Read more about scenario misuse here--> https://doi.org/10.1016/j.erss.2020.101890