your father keeps the engine of his car on even though it is stationary . What harm your father is doing to the environment
 

Dear Student,

If the engine of the car is on even though it is stationary,it can harm environment in many ways:
It causes both air and noise pollution. Every litre of fuel used by a diesel engine,2.64 kg of $C{O}_2$ is released.
Unnecessary idling of engine leads to bad air quality and also results in respiratory and cardiovascular diseases.

Regards