happen, then, if nations meet their promises under Paris? The United Nations organizers of the Paris Agreement once in 2015 (and never since) released an estimate of the total maximum impact of all carbon dioxide cuts promised by all nations. It provides the absolutely best-case scenario that we can hope for. This estimates a total reduction of 64 Gt carbon dioxide through to 2030. According to the UN’s estimate of 0.8°F per 1,000 Gt carbon dioxide, this translates to a reduction in temperature by the end of the century of about 0.05°F. What this tells us is that even in an optimistic
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