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Nature’s Pure Air Monitors

  • April 26, 2013
About Lichens: 1. Lichens are not one plant but 2 or more living together and depending on each other for existence 2. There are nearly 14,00 species in the world 3. They are found at the icy poles, the tropics, on mountain peaks, on tree bark, and even growing on the backs of insects. 4. They can only grow where the air is pure and unpolluted (which is why they are not found in cities!)
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