News tagged with nitrogen

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Red spruce reviving in New England, but why?

In the 1970s, red spruce was the forest equivalent of a canary in the coal mine, signaling that acid rain was damaging forests and that some species, especially red spruce, were particularly sensitive to ...

Aug 30, 2013
4 / 5 (5) 4

Scientists relate urban population to air pollution

(Phys.org) —Live in a large city like New York, London, Beijing or Mumbai, and you are likely exposed to more air pollution than people in smaller cities in surrounding areas. But exactly how a city's pollution ...

Aug 19, 2013
4.5 / 5 (2) 1 | with audio podcast