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Trees Help Clean Up The Air Of Pollutants
Through a process called phytoremediation - literally a "green" technology - plants and trees remove pollutants from the environment or render them harmless.
Phytoremediation uses plants to absorb heavy metals from the soil into their roots.
The process is an attractive alternative to the standard clean-up methods currently used, which are very expensive and energy intensive.
At appropriate sites, phytoremediation can be a cost-effective and sustainable technology, according to Dr. Elizabeth Nichols, environmental technology professor in NC State's Department of Forestry and Environmental Resources.
Through a partnership with state and federal government agencies, the military and industry, Dr. Elizabeth Nichols, and her team are using phytoremediation to clean up a contaminated site in Elizabeth City, NC.
The Coast Guard site was planted with a mixture of fast-growing trees such as hybrid poplars and willows to prevent residual fuel waste from entering the Pasquotank River by ground water discharge.
About 3,000 trees were planted on the five-acre site, which stored aircraft fuel for the Coast Guard base from 1942 until 1991. Fuels had been released into the soil and ground water over time.
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