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Which of the following automobiles release large quantities of carbon dioxide and other harmful gases?
a) motorcycles                    

b) trains
c) ships                                  

d) all of these

d

Which of the following is the result of air pollution?
a) acid rain                         

b) deforestation
c) cloning                                              

d Legend

a

The term smoke was first used in early……….
a) 1800

b )1700                 

c) 1900 

d) 1949

c

Which of the following are the main effects of air pollution?
a) respiratory problems     

b) heart problems
c) asthma                                             

d) all of these

d

How many children were affected in asthma due to air pollution?
a) 2 million                           

b) 3 million
c) 4 million                           

d) 6 million

d

Air pollution reduces visibility and cause…
a) accidents                         

b) cloning
c) deforestation                   

d) Legend

a