| http://www.w3.org/ns/prov#value | - Urban food gardens offer a great source of affordable, nutritious fruits and veggies for city dwellers, but high levels of toxic metals in soil, especially lead, could pose health risks for people who grow or eat the produce, according to some scientists.In places where the soil is heavily contaminated, urban food production may raise as many public health concerns as it solves, said Samantha La
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