The pollutants emitted by jet aeroplanes in the outer atmosphere,such as fluorocarbons,are known as:

$A$ lake,which receives domestic sewage rich in organic waste,may result in:

$3, 4-$ benzopyrene causes:

Carbon monoxide $(CO)$ is a pollutant because it:

Select the correct option for catalytic converters.

Why is $CNG$ considered a better fuel than diesel?
$(a)$ It cannot be adulterated.
$(b)$ It takes less time to fill the fuel tank.
$(c)$ It burns more efficiently.
$(d)$ It is cheaper.
$(e)$ It is less inflammable.
Choose the most appropriate answer from the options given below: