when you are constructing dams like Tehri on Ganga, there is very little flow left in Ganga. The People around Ganga may be of some help, but when there is no flow of water in Yamuna and other tributaries in dry season, how Ganga can remain cleaned.

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when you are constructing dams like Tehri on Ganga, there is very little flow left in Ganga. The People around Ganga may be of some help, but when there is no flow of water in Yamuna and other tributaries in dry season, how Ganga can remain cleaned.