Fill in the blanks :
(i) Rubber particles and dust raised by running motor vehicles are examples of ............... pollutants.
(ii) Too frequent exposure to ......................... in a medical diagnostic technique may damage chromosomes.
(iii) Thermal power plants give out a lot of ...................... waste water.
(iv) Sewage is a liquid waste from ........................... .
Name a waste gas released by the plants (a) only during the day time, and (b) only during the night time.
Complete the following: (ii)is a reusable waste