How the pollution caused by burning fossil fuels can be reduced ?

Explanation

The pollution caused by burning fossil fuels can be reduced by:
(1) Increasing the efficiency of the combustion process.
(2) Using various techniques to reduce the escape of harmful gases and ashes into the surroundings.
(3) Use of lead free petrol, nitrogen filter in exhaust pipe.
( 4 ) Regular check-up and servicing the vehicles, no vehicle zone, no vehicle day.
(5) Use of CNG as fuel.
(6) Use of public transport services, etc.