Review Pollution Grade 5

... is the contamination or dirtying of the environment by the discharge of harmful substances into the air, water, or soil.

The burning of fuels in houses, factories, and vehicles adds smoke and poisonous substances to the environment, causing ...

• air pollution

• land pollution

• water pollution

• waste

Waste from our house and factories are dumped into rivers, lakes, and seas, causing ... pollution

What are biogradable materials?

Mention three examples of non-biodegradable materials!

Land pollution is also caused by excessive use of ...

• electricity

• pesticides

• oil

• soot