Sec 2 WB 9.1 Sample Answer

Qn 2b)
Industries release large amounts of dust, soot and poisonous gases such as sulphur dioxide.
Vehicles release smoke and harmful gases such as carbon monoxide and nitrogen oxides.
Forest fires produce dust and smoke.

Qn 2c)
When we are exposed to dust and smoke for a long time, we can develop respiratory problems such as bronchitis and asthma.
Breathing in sulphur dioxide and nitrogen oxides over time can increase the risk of developing lung and heart diseases, and even cancer.
Breathing in carbon monoxide can result in death.

Qn 2d)
Driving vehicles in low visibility due to the haze may be dangerous. All flights may also be stopped.
Tourists may postpone or cancel their trips to the country thus affecting the tourism industry negatively.

Qn 2e)
The two harmful gases combine with water vapour in the atmosphere to form acid rain. When acid rain falls over the rivers and forests, it destroys vegetation and kills fish as the water becomes too acidic for the trees and aquatic life.

*This is only a sample from the publisher. Some of your schoolmates were able to give me really good answers/explanation. I will be removing the answers just before the March holidays. PLEASE do your corrections before I collect your files for checking.