Oxygen-starved dead zones that cannot sustain life now cover an area roughly the size of the state of Oregon. Spanish researchers alsorecently found that many species die off at oxygen levels well above what is now considered uninhabitable, suggesting that the extent of dead zones in coastal areas is greater than previously known. Dead zones are caused by excess nitrogen from farm fertilizers, factory and vehicle emissions, sewage and other pollution runoff.
Tuesday, July 21, 2009
Mind-Boggling Green Facts & Statistics - 1
Oxygen-starved dead zones that cannot sustain life now cover an area roughly the size of the state of Oregon. Spanish researchers alsorecently found that many species die off at oxygen levels well above what is now considered uninhabitable, suggesting that the extent of dead zones in coastal areas is greater than previously known. Dead zones are caused by excess nitrogen from farm fertilizers, factory and vehicle emissions, sewage and other pollution runoff.
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