I’ve shared this story on Earth Day in previous years, but think it might be new to some people who read it.
Back in the 1970s I was working at California School for the Deaf when we had an infestation of head lice. None of us had ever heard of those critters before since they hadn’t been in our state. We tried everything to get rid of them, but nothing worked.
Finally someone went down to the Public Health Department and they gave us a substance to use that would probably get rid of the lice, so we spent the very first Earth Day (it was a local thing that year) putting DDT on the heads of all the children.