Associate Professor Rajalakshmi Nandakumar said many gardeners were unaware of the risk of lead contamination in urban soil. They think about pH levels, but no one says they need to test the soil for lead, he said.
The project was inspired by a study of soil samples in New York City; where nearly half contained lead levels exceeding 400 parts per million, the nation’s previous safety threshold.
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Source: Ferra
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