As an intuitive: Trump's being against Global Warming will cost up to 4 billion lives this century alone

This is how it works unless the timeline changes somehow:

Trump's actions (or non-actions) cause the deaths of 1 to 2 billion people this century both directly and indirectly. They then don't have children or grandchildren because they are dead. So, about 4 billion people either die or won't be born because of Trump between now and 2100 AD.

However, here is the other side of this:

Because of the 1 to 2 billion people directly or indirectly killed through starvation or death in world calamities of various kinds and because they don't have the children they aren't now going to have, the other strange paradoxical side of this is the human race ALSO doesn't go extinct between 2080 and 2090 and so the insanity of Trump (and other anti- Global Warming leaders on earth) strangely enough also prevent human extinction between 2080 and 2090 which buys the human race about 50 years in trying to adjust so we all don't go extinct by 2130.

This is the timeline as it is now looking forwards.

However, because I'm telling you the future you can also change it to a better  one now if you wish.

By God's Grace