How can nuclear wastes be controlled and managed?

How can air pollution be controlled?

How can noise pollution be controlled?

How Ozone depletion can be controlled?

Global warming can be controlled by

Which of the following is/are correct ? (i) Chain reaction takes place in a nuclear reactor and an atomic bomb. (ii) The chain reaction in a nuclear reactor is controlled. (iii) The chain reaction in a nuclear reactor is not controlled. (iv) No chain reaction takes place in an atom bomb.

How radioactive wastes are generated?