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reduce vt. & vi.
减少，降低
e.g. We can reduce air pollution by riding bicycle.
turn off
关上（开关）
e.g. We can save energy by turning off
the lights when we leave.
recycle vt. 回收利用，循环利用
e.g. We can protect the environment
by recycling things.
wise adj.
明智的，充满智慧的
e.g. The professor is very wise.
这名教授充满智慧。
cause vt. 导致；造成
e.g. Human pollution causes global warming.
人为污染导致全球变暖。
take a shower
e.g. We can save water by taking
shorter shower.
Role-play
What are you going to do, Hobo?
Plant trees.
Will more trees be planted this year?
Yes. Trees are good for us.
OK. I’ll go with you. I like digging in the garden.
Are you serious?
Sure. I’ll plant breadfruit trees. Breadfruit… Yummy!
1. What is Hobo going to do?
2. Will more trees be planted this year?