Fill in the blanks with appropriate words to provide some information about the 'pollutions is Dhaka City."

(a) Air gets________in many ways.

(b) By inhaling polluted air, people________sick.

(c) Air pollution is a great________to our existence on earth.

(d) There_________many reasons for air pollution.

(e) We must keep air________and free from pollution in order to survive on earth.