Match the items in column I with the closely related ones in column II.

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 ……………

Give two examples of :

(a) Biodegradable wastes

(b) Non-biodegradable wastes

(c) Particulate pollutants

(d) Greenhouse gases

(e) Radioactive pollutants

List two major harmful effects of each of the following:

Rivers contaminated with sewage.