To understand the extent to which human activities are polluting Earth's atmosphere and oceans, it's important to distinguish human-made pollutants from compounds that occur naturally. A new study finds that deposition of ammonium, a source of nitrogen pollution, over the open ocean comes mostly from natural marine sources, and not from human activity.
from Oceanography News -- ScienceDaily http://ift.tt/1q21Smz
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from Oceanography News -- ScienceDaily http://ift.tt/1q21Smz
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