Unit 7 Protect the Earth (Revision)课件（共33张PPT）

(共33张PPT)
Unit 7
Protect the Earth
(Revision)
Earth Day is on 22nd April.
World Environment Day is on 5th June.
Let’s review
When
World Forest Day
World Forest Day is on 21st March.
World Water Day
World Water Day is on 22nd March.
3.22
Tree Planting Day
Tree Planting Day is on 12th March.
World Food Day
World Food Day is on 16th October.
Oct. 16th
The Earth is our home!
Think and say
We live on Earth. We need(需要)...
clean water
clean air
healthy food
健康的食物
a lot of energy
Is there enough(足够的) clean water on Earth
Is there enough(足够的) clean water on Earth
In many places, there is not much water.
In many places, people are short of (短缺) water.
Is there enough(足够的) clean water on Earth
In some places, the water is very dirty.
Some factories pour the waste water(工业废水) into the rivers.
People dump the trash(垃圾) into the rivers.
What makes the water dirty
Rubbish and waste water from factories make the water dirty.
There isn’t enough clean water on Earth!
clean air
clean water
healthy food
a lot of energy
Is there enough(足够的) clean air on Earth
Is there enough(足够的) clean air on Earth
hazy days
雾霾天
雾霾天气是一种大气污染状态，雾霾是对大气中各种悬浮颗粒物含量超标的笼统表述，尤其是PM2.5，被认为是造成雾霾天气的“元凶”。随着空气质量的恶化，雾霾天气现象出现增多，危害加重。
Is there enough(足够的) clean air on Earth
What makes the air dirty
Smoke from cars
makes the air dirty.
Black smoke from factories
makes the air dirty too.
People cut down too many trees.
Less(更少) trees, less clean air.
There isn’t enough clean air on Earth!
clean air
clean water
a lot of energy
healthy food
Can we get enough healthy food
Can we get enough(足够的) healthy food
People put rubbish into the soil（泥土）.
People put rubbish into the river.
We can’t get enough healthy food.
plastic
To live on Earth, we need...
a lot of energy
clean air
clean water
healthy food
Is there enough energy on Earth
People use oil to drive cars.
People use coal to generate electricity.
发电
Is there enough(足够的) energy on Earth
People use coal to keep warm.
Is there much coal or oil on Earth
No!
Do you know
If we do nothing, but keep using coal and oil,
there will be NO coal on Earth in about 100 years.
there will be NO oil on Earth in about 50 years.
There isn’t enough energy on Earth.
There isn’t enough clean water on Earth!
There isn’t enough clean air on Earth!
We can’t get enough healthy food on Earth!
There isn’t enough energy on Earth!
What should /
shouldn’t we do
We should save water.
We should turn off the taps after washing hands.
We can reuse water to water flowers and flush the toilet.
reuse water to...
There is not enough clean water on Earth, what should/ shouldn’t we do
We should keep the water clean.
There is not enough clean water on Earth, what should/ shouldn’t we do
We should put rubbish in the bin.
We should build
(建造) factories away from the rivers.
We live on Earth. We need clean water.
Is there enough clean water on Earth
In many places, there is not much water.
In some places, rubbish and waste water from factories
make the water dirty.
So there is not enough clean water on Earth.
What should we do to save water and keep it clean
We should turn off the taps after washing hands.
We should reuse water to water flowers and flush the toilet.
We should put rubbish in the bin.
We should build the factories away from the rivers.
Problem and reasons
问题及原因
Solutions
措施
There isn’t enough clean water on Earth!
There isn’t enough clean air on Earth!
We can’t get enough healthy food on Earth!
There isn’t enough energy on Earth!
What should /
shouldn’t we do
We shouldn’t drive so much.
We should move some factories
away from our city.
We should not cut down too many trees,
because trees help keep the air clean.
There is not enough clean air on Earth, what should/ shouldn’t we do
There isn’t enough clean water on Earth!
There isn’t enough clean air on Earth!
We can’t get enough healthy food on Earth!
There isn’t enough energy on Earth!
What should /
shouldn’t we do
We should keep the soil (土壤) and the water clean.
Reduce, reuse and recycle.
Recycle 回收利用
Reduce
减少
Reuse
再利用
We can’t get enough healthy food, what should/ shouldn’t we do
There isn’t enough clean water on Earth!
There isn’t enough clean air on Earth!
We can’t get enough healthy food on Earth!
There isn’t enough energy on Earth!
What should /
shouldn’t we do
We should save energy.
We should use other energy.
solar energy
太阳能
wind energy
风能
water energy
水能
We should use energy-saving lights(节能灯).
We shouldn’t use air-conditioners
(空调) too much.
There isn’t enough energy on Earth, what should/ shouldn’t we do
Make a poster
Let’s think
How to make a poster
1.Choose a topic.
(选一个主题).
2.Write something about the topic.
Let’s share
1. Choose a topic
(选一个主题).
2. Write something about the topic.
3. Draw or stick(贴)
some pictures.
1. Finish the poster with your classmates and tell more students to protect the Earth.
2. Find more solutions to protect the Earth.
Homework
？
We live on Earth. We need clean water.
Is there enough clean water on Earth
In many places, there is not much water.
In some places, rubbish and waste water from factories
make the water dirty.
So there is not enough clean water on Earth.
What should we do to save water and keep it clean
We should turn off the taps after washing hands.
We should reuse water to water flowers and flush the toilet.
We should put rubbish in the bin.
We should build the factories away from the rivers.