该主题属于人与自然范畴涉及环境污染的原因，环保意识和行为。
一 、单元内容分析。
本单元有三个话题，Pollution has cost too many problems. All these Problems are very serious，What can we do at home to Protect the environment?三个话题提出环境污染问题，分析环境污染问题，解决环境污染问题。每一个话题有两个对话语篇和两个阅读语篇构成。
本单元的核心语言主要围绕环境污染和解决污染的措施展开。涉及对环境问题的描述，如污染问题及其产生的原因和对人们造成的直接伤害（ water pollution 、ight pollution等六大环境污染成因和危害 Chemical factory、 traffic Problems，Sore eyes and breathing Problems ）、污染造成环保问题（A lot of rich land change into desert 、Some kinds of animals are becoming fewer and fewer、some animals are in danger of dying out completely.fewer trees and green house effect ）以及应对污染问题所采取的措施和建议（Reduce reuse and recycle/ Collect waste paper and soft drink cans /sort them /Walk or ride A bike instead of taking a bus or taxi /Shut off the electricity /Take A cloth when go shopping /looking for new ways to Produce power /biogas technology /renewable sourse）。
体现单元核心素养综合表现的重点语言表达如下
环境污染问题
There are several chemical factories pouring waste water into the River and stream .
The chemical factory Produce terrible gas .
And the air made my chest hurt .
What was worse，the factory made too much noise and I couldn't sleep well at night .
It is not disturb others but also does great harm to people's hearing .
Cars and machine also Produce too much noise .
Such pollution makes people feel uncomfortable and unpleasant .
And it can even cause them to become sick.
环境污染形成的原因及其对环境的危害重点语言表达如下:
People cut down too many trees as a result a lot of rich land trees into desert.
Some animals are in danger of dying out completely.
This is very dangerous because this kind of rabbish even can cause cancer .
As a result many rivers and lakes are now dead.
It causes the level of the oceans to rise and the climate of the earth to change .
应对环境污染采取的措施和建议
We should reduce the waste we Produce.
It's important to reuse recycle and reduce .
We ought to shut off the electricity when we leave a room .
Youd better walk or ride A bike instead of taking a bus or a taxi.
Take a cloth bag.
Looking for your renewable sources.
Plant more trees.
No over packing .
还需要再梳理，与课标上的相比，课标梳理的更加条理性。在梳理体现单元核心素养综合表现的重点语言表达时分为环境污染问题、环境污染问题、环境污染影响、环保行动和计划、说明环保意义。最为关键的是这几个部分下面对应的语言知识都是专题性的，固定内容和固定的语言点，明天我还要再梳理。
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