Which of the following statements is incorrect?

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The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.

Microbes play a major role in treating millions of gallons of waste water everyday across the globe. This methodology has been practiced for more than a decade now, in almost all parts of the world.

Till date, no man-made technology has been able to rival the microbial treatment of sewage.

The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan to save these major rivers of our country from pollution.

answer is B.

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Detailed Solution

Microbes play a major role in treating millions of gallons of waste water everyday across the globe. This methodology has been practiced for more than a century now, in almost all parts of the world.

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