There is an error in each line.Find the errors and correct them- :

Pollution is one of a most serious

problems facing humanity.This problemwas complicated because pollution

is cause by the objects and activities

this benefit mankind.Two third

in Delhi's atmospheric pollution

is caused of vehicles.The people

should be make more aware of

that problem so that the pollution

should be checked.

Pollution is one of a most serious  of the most

problems facing humanity.This problem was complicated because pollution  being faced by

is cause by the objects and activities  is caused by

this benefit mankind.Two third  that benefit  

in Delhi's atmospheric pollution  of Delhi's

is caused of vehicles.The people  by vehicles

should be make more aware of  be made

that problem so that the pollution  this problem

should be checked.  can be