List any three human activities that would lead to environmental pollution.

Which of the following is not a greenhouse gas?

State whether the following statement is True or False:
All movements of air resulting in diverse atmospheric phenomena are caused by the uneven heating of the atmosphere in different regions of the earth.

List any two causes of increase in concentration of $CO_{2}$ in the atmosphere.

It is observed that the number of asthmatic patients is increasing day by day. It is due to urbanization,industrialization,and excessive use of vehicles. Sidak's mother took some initiatives to reduce this problem. She,along with her son and his friends,prepared data on the destinations colony people visit,the different routes taken,and the timings of their jobs,and arranged for carpooling.
$(a)$ Explain the reason for the growing number of asthmatic patients.
$(b)$ Explain the values shown by Sidak's mother.
$(c)$ Suggest other methods to reduce this problem.

Smog is a combination of: