Put the sentences in the correct order. Make up a story.
a. We can recycle plastic, glass, paper.
b. We cut down trees, pollute air and water.
c. We mustn't litter water and use water filters.
d. People mustn't build plants to send smoke into air.
e. The Earth is in danger.
f. Animals leave their places.
g. They mustn't kill animals.
h. But what can we do to save the Earth?