Our precious Earth

Complete the sentence.

Making rivers, air dirty is ...

... happens when too many trees are cut down.

Rain mixed with toxic chemicals from factories is known as ... .

He wants to become an ecologist himself to research and protect the _____.

We should close all zoos and return the animals to their natural ...

People must _____ aluminium cans, newspapers.

Match the words:

natural ...

Match the words:

endangered ...

The first Earthship was built using...

Loch Lomond is a beautiful ... in Scottland.

We all need air to ...

Acid rains ... fish and plants, people.