| http://www.w3.org/ns/prov#value | - the human fingerprint is most distinct.???Mercury is a naturally occurring element as well as a by-product of such human activities as burning coal and making cement.???If we want to regulate mercury emissions into the environment and in the food we eat, we should first know how much is there and how much human activity is adding every year,??? says Lamborg.???At the moment, however, there is no w
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