Which of the following activities in a forest is not harmful to the environment?

Mention the action taken by the Government to save the river Ganga.

$(a)$ Mention any two advantages of constructing dams.
$(b)$ Name a dam which was a subject of much opposition from locals as well as $NGOs$.
$(c)$ Mention any three problems which may arise due to the construction of large dams.

Among the statements given below,select the ones that correctly describe the concept of sustainable development:
$(i)$ Planned growth with minimum damage to the environment.
$(ii)$ Growth irrespective of the extent of damage caused to the environment.
$(iii)$ Stopping all development work to conserve the environment.
$(iv)$ Growth that is acceptable to all the stakeholders.

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

The most rapidly dwindling natural resource in the world is