Pollution

Pollution is __________________

• harmful things that make air, water, soil dirty.

• clean things that make up the environment.

When smoke comes out from factories and car

• our air gets polluted

• air gets clean

The smoke from factories and cars gets mixed up with the rain water and due to this we get

• rain

• acid rain

Humans and animals breathe in

• oxygen

• carbon-dioxide

Humans and animals breathe out

• oxygen

• carbon-dioxide

How do trees help us? They give us

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Is cutting down trees good for the environment?

• Yes

• No

Sewage water is the dirty water from

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Litter means

• unwanted things that make our place dirty

• useful things