what are the principal sources of excessive
What are the principal sources of excessive nitrate and phosphate in rivers and lakes?
Excessive nitrates and phosphates come majorly from sewage effluents and intensive agriculture.
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what are the principal sources of excessive nitrate and phosphate in rivers and lakes excessive nitrates and phosphates come majorly from sewage
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a what are the two main pollutants that contribute to acid rain b where do these pollutants come from c what direct or indirect effect is acid rain
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