Question

Which river, which was recently in news for failed rejuvenation efforts, is known as Mexico’s most polluted waterway by the UN?

[A] Santiago river 
[B] Rio Grande
[C] River Lerma
[D] Colorado river

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Answer 1

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[A] Santiago River

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Answer 2

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A. Santiago river

Santiago river The United Nations called the Santiago river as Mexico’s most polluted waterway. According to the 2017 figures, less than a third of the country’s industrial wastewater is treated. Recently, Mexico has signed an expansive trade deal with the US and Canada in which it made an explicit promise to conserve its environment.