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should not drive …
use wood to…
keep …clean
should not cut down…
use plastic to…
Too much plastic is bad for…
should not use …
should …
Why ?
How ?
coal
oil
wood
Protect the Earth
gasoline 汽油
electricity 电力
coalgas 煤气
Sometimes we can see them,
sometimes we can feel them.
white pollution
白色污染
A poem
Where is water?
Water
We use water to cook rice.
It’s in the sea,
In the lake, in the river.
We use water to wash clothes.
We use water to water flowers.
Useful !