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Some types of lichen, like pixie lichen, don’t look rough or leaf-like — they can look positively otherworldly. (Image: Preyah James / Scenic Hudson)
Outdoors
History + Culture
Outdoors
Land + Air + Water
History + Culture

Protected: Learning From Lichen, an Indicator Species

Among their many other amazing qualities, these special symbiotic organisms show us whether (and which) pollutants might be in the air.

by Jordi Espinasa
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