A half century ago today was the first Earth Day, which I paerticipated in while at the University of Wisconsin-Madison. Although I did not know him well, I even met the founder of the event, then Senator Gaylord Nelson of Wisconsin. While it is easy to be discouraged by the ongoing failure to deal with the global warming issue as well as the large amount of rollbacks of reasonable environmental regulations in the US by Donald Trump, with several happening very recently under cover of the SARS-Cov-2 pandemic, much has also been achieved, with vastly reduced air and water pollution of many types over the last half century in most nations.
It is easy to forget that in 1970 there was no Enviromental Protection Agency and that most of the most basic laws regulating most air and water pollutants were not in place almost anywhere in the world. I remember seeing the Cuyahoga River in Cleveland in 1965, a year it caught fire, when it not only stank but had an unpleasant pinkish hue to it. Today it looks like regular water and fern bars and restaurants stand beside it where in good weather (and no pandemics) people sit outside to eat and drink beside it.