This reminds me of the research on saccharine that involved massive doses of it in mice. The belief that pumping huge amounts into a mouse can substitute for lower levels over long times always struck me as odd. Most systems, especially biological ones, have a critical level where systems fail. An example is the body’s ability to process toxins like alcohol in the liver. If you overwhelm the enzymes in the liver you get far different results than if you gave low levels over long periods.
The singularity that supposedly lies inside black holes is more likely just a result of a huge gap in our understanding and a dead end in general relativity.
Mostly Americans who don’t travel say this because they haven’t experienced lazy people in other countries. I’ve seen plenty of dumping of trash, destruction of natural places, etc in other countries.
What you get when no one is in charge. There are always people who will abuse a common trust. People will litter within feet of a trashcan or leave a cart a few spaces from a cart corral.