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by tracy » Mon Sep 27, 2010 7:03 am
Apparently moss is a very good indicator of pollution!
http://planetearth.nerc.ac.uk/news/story.aspx?id=819
by Rich » Mon Sep 27, 2010 8:22 pm
I believe lichens are too, vaguely recollect studying them on a chuch in 'polluted' Brighton in the 80's!
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