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Roadside Magnetic Leaves

27.11.2009

According to the leaves of trees, one can judge the level of air pollution, according to American geophysicists.

Everything that is contained in the exhaust gases, and not only in them, settles on the leaves of trees, including microscopic particles of iron oxide with magnetic properties. After that, the leaves also become magnetic, and the level of their magnetism can be used to judge how polluted the air is by the products of fuel combustion.

This was found out by researchers from the University of Western Washington, led by Bernie Hausen, by analyzing the leaves from trees that grow in the city next to the bus stop, on the next street and outside the city.

As expected, the most magnetic, that is, dirty, were the leaves in the area of the stop. On the neighboring street, the pollution level turned out to be 2-8 times lower, and outside the city - 4-10 times lower. It turns out that if, when traveling around the city, you choose not a busy street, but a quiet lane, then not only cleaner air, but much cleaner air will get into your lungs.

By the way, these data are confirmed by the research of scientists from the University of Leeds (Great Britain), headed by Professor Alison Tomlin. They found that on the street next to the city highway, the content of carbon monoxide in the air is less than some percentage, but as much as four times.

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