1. To avoid pollution, we must dispose of waste properly.
2. Disposal of waste from housing areas
a) Rubbish must be thrown into rubbish bins, and not burnt or thrown into drains
b) Rubbish must be wrapped properly in a plastic bag and tied before it is thrown away.
c) Rubbish is collected by garbage trucks to be sent to waste disposal centres.
3. The collected rubbish will be disposed of in two ways.
a) The rubbish is dumped in layers at a large site called a landfill. The rubbish is compressed using a steamroller.
b) The landfill site must be safe from flooding is heavy rain occurs and also far from housing areas.
c) In some places, the rubbish is burned in an incinerator.
4. A lot of rubbish like old newspapers, aluminium cans, glassware and some plastics can be recycled. Before we throw our rubbish away, we should separate it up into different groups.
5. Waste water from factories, homes, schools and offices is usually channeled into the sewage system.
6.The sewage is treated in sewage treatment plants to make it safe before it is discharged into the sea.
7. Factories should be fitted with long chimneys. Filters are fixed on the chimneys to reduce the release of air pollutants.