It's fitting that "prosperous market-oriented societies" do the most to fix "environmental problems" because they did the most to create them for the global poor. 

Any other response is immoral. Trump's decision to pull the US out of the Paris Accords, thus, is deeply immoral. The global poor will suffer because of the damage done to the climate by rich nations, including the richest, the USA. 

How do you feel about redistributing some of that wealth created by the industrialized free market to the global poor, who had little if any role in creating their problems?