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 ........................... .
Question 3 Fuel used in thermal power plants is (a) water (b) uranium (c) biomass (d) fossil fuels