This is aimed, in no small part, at my many friends in the US, who I see alternating between despair at their own ‘government’’s behaviour and angst-laden apology to the world for their current Liar-in-Chief. Please, folks, relax, a little at least.
Yes, the withdrawal of the US from the Paris Agreement will do damage – indeed, it already has – but that damage is less to the mitigation of anthropogenic climate change than to US influence in the world.