Which of the following metals is a water pollutant and causes sterility in human beings?

Which of the following statements is $NOT$ true for aerosols?

Define/Explain the following terms:
$(i)$ Eutrophication
$(ii)$ Jhum cultivation

In the agricultural field,excessive irrigation for a long period of time leads to the problem of .........

In water bodies,fish die due to eutrophication because of the lack of which of the following?

Given below are two statements:
Statement $I:$ In a scrubber,the exhaust from the thermal plant is passed through a spray of water or lime to remove gases like $SO_2$.
Statement $II:$ Particulate matter $(PM\,2.5)$ cannot be removed by a scrubber but can be removed by an electrostatic precipitator.
In the light of the above statements,choose the most appropriate answer from the options given below: