A recent study lead by the University of Eastern Finland has found that the planting of willow trees can be used as a cost-efficient and effective method of purifying contaminated soil.
The study shows that willow trees can clean soil from zinc, in as little as 6 years, from nickel in 10 years, and chromium, copper, & in 10-15 years. Willows have the ability to grow in highly acidic soil, and could be such a grey method of purification if people planted them in polluted areas, especially in or near landfills. This study has only been observed in Finland and in Russia, and its only a matter of time before this project will take off and spread around the world, hopefully resulting in a less-contaminated and cleaner environment.
For more information, go to:
http://www.uef.fi/en/metsa/-/paju-puhdistaa-saastuneita-maa-alueita-kustannustehokkaasti
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