Agreed. Elegantly put. Self interest is a powerful force in capitalist society. One of my fave quotes is (from Lenin, I think) something like "when the time comes to hang the capitalists, they will bid against one another for the rope contract." What a ghastly compliment he pays to the free market.
As to our abilities to screw up things, on a small scale we seem to have assumed that we can affect the ozone layer and air quality. I really don't know what happened to the former when we banned stuff, but as to the latter, LA's air seems cleaner when I visit, presumably thanks to steps taken. (By the way, one of my great experiences was when a friend I had met on an airplane took me up to Loyola U, I believe, in LA, to check out the view on a hill facing east following a rainfall. What a magnificent, beautiful view of the LA basin that was, with snow on the San Gabriels in the distance. No wonder Hollywood decided to move from Long Island to make movies in, well, Hollywood.) This was 50 years ago and I remember it still.)
I read somewhere that there are a billion cars in the world. Don't know if that is true, but if half that number start up daily, I assume it has some effect. Global, who knows? But I keep returning to capitalism. Tobacco companies lied to us about its danger because it was in their self interest. Now we have oil companies warning us about the climate and bragging about what they are doing. Apples and oranges, I know, but that means they have taken a look and see something written on the wall.