The main cause for abundant coliform bacteria in the river Ganga is

In our country,vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes:

Write one negative effect of an affluent lifestyle of a few persons on the environment.

Select the wrong statement.

In our country,there are attempts to increase the height of several existing dams like Tehri and Almati,dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams:
$(i)$ Terrestrial flora and fauna of the area is destroyed completely.
$(ii)$ Dislocation of people and domestic animals living in the area.
$(iii)$ Valuable agricultural land may be permanently lost.
$(iv)$ It will generate permanent employment for people.

Opposition to the construction of large dams is due to