Well, the US put on a good act of cleaning things up but it's belied by the amount of money that still has to go into EPA Superfund sites. And there's still lots of streams and rivers where it's unsafe to eat the fish from because the riverbeds remain highly toxic due to the chemical dumping the old textile industry was doing. Never figured out the part where not poisoning the air/water/soil was such a horrible thing to expect from those dauntless and titanic captains of industry.
As for the commies, their hi-lite (next to Chernobyl and the Aral Sea) remains the
Kyshtym region of Russia. Apparently there's a stretch of highway going through that area where stopping for a hundred kilometer stretch is forbidden due to the background radiation level still being dangerously high over sixty years after the disaster. Word was that they were dumping waste in ditches and when it rained the heat from the radiation turned the water to steam that carried the radioactive particulates over thousands and thousands of square miles. Good ol' Russian contempt for human life - it's a built-in feature of their way of life that transcends all politics.