The developing countries are picking up the tab for our profligacy with failed crops, dried up water supplies, rising sea levels, uninhabitable areas of land and more. But perhaps the most significant causal factor is prejudiced, ridiculous and inadequate armchair polemicists along with a powerful right-wing lobby, who for years have denied what was happening, ignored the science or vacillated over what to do.
Nothing will ever convince them, because they are cultists. They are not interested in the science, and as such should be ignored.