Below are given statements followed by some conclusions. You have to take the given statements to be true even if they seem to be at variance with the commonly known facts. 
Statements: 
1) Because of motor vehicles like cars, pollution has increased manifold. 
2) Respiratory diseases are increasing due to pollution. 
Conclusions: 
I. If cars were not there pollution would be nil 
II Doctors earn a lot due to pollution. 
Decide which of the given conclusions logically follow(s) from the given statements.