The Lichen Loophole

By William McKeehan on May 14, 2015 1:59 PM | No Comments

Here's a story that I read:

In 1976, out came a book titled “Lichen as Pollution Monitors.” In 1979, “How to Know the Lichens” joined it on the shelves.

via Pocket http://ift.tt/1fm1eKI