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what kinds of pollution do you know around us?
........
There are many kinds of pollution around us,
air pollution
light pollution
litter
water pollution
soil pollution
noise pollution
Who made these pollution?
Humans
How do humans made these pollution?
cut down trees
throw away litter
kill animals
pruduce waste gas
Pour waste water into rivers
Use disposable(一次性的） plastic products
Waste resource
...........and so on
Pollution has caused too many problems for us.
Such as :
disease
greenhouse effect
endangered animanls
Land desertification(荒漠化）
acid rain
So how to protect our environment?
Do you want to be a greener person?
1b Listen to 1a and choose the correct answers.