POLLUTION CAN BE MEASURED BY MAGNETS SAY AMERICAN SCIENTISTS
October 1st, 2009
BY MONICA DOBIE
WE all know heavy metal particles are pumped into the air by industry, but American scientists have developed a way of measuring this pollution by detecting magnetism in tree leaves coated by these emissions. This could be a cheap and effective way of pin pointing pollution hotspots claims Bernie Housen, a geophysicist at Western Washington University.
His studies suggest that exhaust from cars and other pollution sources stick metallic particles to tree leaves on trees near roads and pathways. These respond to techniques using simple magnets - ...
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