This photo, taken with a scanning electron microscope, shows one an iron-oxide sphere of pollution produced by combustion, and collected with a double-sided tape collector. Credit: Rachel Housen, Whatcom Middle School/Bellingham High SchoolFrom Live Science:
Tiny particles of pollution that are harmful to human health stick to tree leaves and leave a trace magnetism, a new study finds. More pollution is found stuck to leaves of trees near busy roadways than those in less trafficked areas.
The pollution-trapping leaves could serve as an easy, inexpensive way to monitor pollutant levels, researchers say.
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