News tagged with concentration

Tracing nitrate in watersheds

Plants need nitrogen to grow, and nitrate is a common fertilizer ingredient, but high levels of nitrate contamination in drinking water sources can cause health problems. It is generally known that nitrogen flows through ...

dateMar 15, 2013 in Environment
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Dwindling buffer effect?

(Phys.org) —The Southern Ocean could absorb relatively less carbon dioxide in future if the global temperatures continue to rise as a result of human activities, as climate researchers from ETH Zurich demonstrate ...

dateMar 28, 2013 in Earth Sciences
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The pathways of a shape-shifting pesticide

The pesticide endosulfan is being phased out in the United States because of its threat to humans and wildlife. But researchers still want to understand how endosulfan moves through the atmosphere after it ...

dateSep 20, 2013 in Environment
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