Question

which of the following are causes of smoke emission?

• A. Burning of dry leaves
• B. Bursting crackers
• C. Vehicles
• D. Planting trees

Answer 1

Answer: (A), (B), (C)

The correct options are
A Burning of dry leaves
B Bursting crackers
C Vehicles

Smoke contains harmful gases and irritating tiny particles such as ash and dust. The main causes of smoke emission are:
$\bullet$ Bursting crackers
$\bullet$ Vehicles
$\bullet$ Burning of dry leaves

These activities release gases and dust in the form of smoke into the atmosphere which leads to air pollution. Whereas, planting of trees reduce air pollution.