Unit 2 Topic 1Pollution has caused too many problems.Section C
Speak out the names of the pollution.
air pollution
light pollution
litter
water pollution
soil pollution
noise pollution
noise pollution
Noise is a sort/kind of pollution.
There are all sorts/kinds of noises.
They make us uncomfortable and unpleasant.
n. 种类； v. 把……分类
adj. 使人不舒服的
adj. 令人不快的