Gravity, climate and simple technology that works as a basis for an economy. There are more peace under Trump, perhaps only because he doesn't listen to his own government?
I don't know.... Facts are facts, there is less conflict under Trump the last few years, rather than ISIS stories constantly, and how it's getting worse. It's about him offending China or some such.
Wish he had a notable litterary persona as a friend to write and speak for him... And he is a dick, but that is better than a nice guy everything falls apart around. Or some war mongering fool with a need to abuse power on behalf of a nation, like killing people for shooting down an unmanned drone.
So gravity and Coal power plants -- as long as you can burn things to power them, like for example petroleum based plastics, they have a use!
People with solar panels on the roof may still burn wood for heat during winter, could they upgrade the chimney to harvest the thermal energy?
Steam tecnology is pretty awesome, and will never go away.
Many, "good news everyone, we are shutting down dirty coal plants" news stories in the west.
https://www.carbonbrief.org/mapped-worlds-coal-power-plants
That is the reality however, and may never change, where alternative fuel to coal is the thing needed.
Like wood and stuff, or upgrading and changing to allow other fuel sources, like the more moderne mixed fuel power plants.
Drag that slide to the future and at least be happy about Africa getting an economic boost in addition to Asia due to these practices.