1. What is one of the major sources of outdoor air pollution ?

a) Burning of fossil fuels
b) Vehicular emissions
c) Indoor heating sources
d) Natural dust storms

2. Which activity contributes to ammonia pollution during springtime?

a) Vehicular emissions
b) Industrial waste
c) Farming and livestock activities
d) Construction dust

3.What is a natural source of outdoor air pollution ?

a) Vehicular emissions
b) Dust storms
c) Industry emissions
d) Waste deposition in landfills

4.Which indoor air pollution source is specifically mentioned as being related to cancer-causing material?

a) Heating with kerosene
b) Smoke from factories
c) Ventilation systems
d) Insulation materials

5.What can happen if ventilation is poor in homes?

a) Spread of toxic mold
b) Increase in radon gas levels
c) Decrease in air pollution
d) Improvement in indoor air quality