![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
40 years ago this evening, pollutants in the Cuyahoga River in Cleveland, Ohio, caught fire and burned. Since then, a lot has been done to clean up this and other waterways. But in the humble opinion of this correspondent, there's still a lot to be done.