What has the Ministry of Environment and Forests initiated to save the major rivers of our country from pollution?

In which state/country are Ecosan toilets not found?

Ecological backlash (or Ecological Boomerang) is:

Choose the correct option regarding the following statements:
$(1)$ $CO_2$ contribution in global warming is $60\%$.
$(2)$ Greenhouse effect occurs due to deforestation.
$(3)$ Due to the greenhouse effect,the present average temperature at the surface of the Earth is $15^oC$.
$(4)$ The amount of $DDT$ in small fish is $0.05\ ppm$.

Which of the following is a non-renewable resource?

Eutrophication is caused by