Except the US won't do anything to solve their part of climate change, and the change in leadership will not affect their inaction. I think the best bet for solving climate change is a shift to renewable energy and laws and standards for AI and bot use.
Every country also contributes to climate change. It's not exactly an issue where you can put sole blame on someone. China for instance, emits the most CO2, but not by per capita, and also because they handle the world's manufacturing and emissions. The Middle East, Oceania and countries below the equator all contribute more than their share of emissions... But that's also because they're in a hotter, drier climate.
Short-sighted? Please. Nothing major changed in the world from 2016. There was Korea, and... That's bout it. Geopolitically.