Greenwashing or marketing doesn't mean that the issue is trivial.
A climate change that happened about 50 million years ago, was much larger in magnitude than what we have experienced to date. It was 6°C, compared to our almost one degree now. The difference is speed. Today the surface of the Earth is warming almost 60 times faster (0.17°C per decade versus 0.003°C per decade) than it was during that 6°C change at the Paleocene-Eocene boundary.
Have you wondered much about carbon taxes? You presumably live in the first district in North America to have one. Do you know what the point is? You just listed all the ways that humans externalize. If it doesn't cost them anything, they don't really care. It's called the Tragedy of the Commons. Think of what would happen to a river if there was no regulation at all. Someone could withdraw all kinds of water and the downstream users would be going without. Or they might get rid of waste products from their mill into the stream, resulting in damage to downstream users.
A carbon tax is called a pigovian tax. Pigovian taxes are used to add cost to things deemed harmful, and really good ones will offset the tax by dropping the tax on something which would be beneficial to encourage, like personal savings.
Anyways, it all gets back to the point that people often don't care unless they know about something, and/or you make it costly to continue doing. Knowing about environmental damage isn't enough for some people, so you need to change the market(s) so that people have options and choices to make.