Chapter 9

3. Factories and vehicles that burn fuel gives off _________ into the air.
7. Electric cars refer to cars which run on ___________ instead of petrol.
9. We must work ______________ to reduce vehicles air pollution.
10. Dangerous gases escape from the exhaust ___________ of vehicles.
11. One of the main causes of air pollution comes from motor _____________.
12. Air pollution can cause school, transportation and business to shut ________.
14. Haze is made up of __________ particles in the air.

1. We can cause air pollution directly through our use of _____________ for transportation.
2. Haze is caused by traditional practice of __________ and burn.
4. Vehicles that are not properly maintained causes __________ air pollution.
5. Car emit dangerous __________ into the air.
6. Slash and burn refers to the cutting or burning of forests to create fields for growing of _____________.
7. Air pollution can be caused by forest fires, factories and open ___________.
8. Air pollution has a clear impact on our health and ________________.
13. Air pollution can cause headaches, ___________ and sickness.