For any nation to take meaningful action on climate change it will require some sacrifice of wealth for the citizens of that nation. In other words for the world to address climate change, short of a world government, nations need to take action individually which result in them each as much as possible contributing to a collective action and result that is sufficient to deliver a meaningful reduction in GHGs. This is obviously a challenge for democracies and even autocracies- as you are asking your citizens to suffer somewhat in the short term in the interests of acting responsibly in the longer term interests of all global citizens. It is very easy for populist politicians to appeal to voters and powerful energy sector lobbyists and not take such action.

Such a refusal to take action is accompanied with an implicit or explicit denial of climate change- because to acknowledge climate change and its projected (and already measured) implications would expose those populists as the selfish reckless idiots they are.

Trump exited the Paris Climate Accords - signalling what he is and where he stands on this- FUCK the WORLD, We the USA are going to continue consuming far more per capita, and emitting far more GHGs/capita than most other nations and we don't give a fuck about the millions of people globally who will be negatively affected by our selfish short sighted greed. Some Libertarian 'economists' appear to be parroting Trumps climate change denial Death Cult Insanity.