Global warming?

[xoxoxoBruce]

Back in colonial days they drank beer because the water wasn't safe. Before WWII the smoke in Pittsburgh blotted out the Sun, but probably the worst harm has been invisible for the most part, the hundreds of thousands of chemical compounds cooked up since the mid-20th century.

Remember China has compressed the industrial revolution, chemical revolution, and electronic revolution, into a few decades, and all the possible pollution from each, was dumped on them in a short time. They're learning quickly how devastating it is, and I suspect they will have to act soon.