English 8
UNIT 7 . POLLUTION

PERIOD 59: SKILLS 2
Welcome to our class
VOCABULARY
algal (n) tảo
bloom (v,n) nở hoa
discharge (n,v) phóng điện
Power plant (n) nhà máy nhiệt điện
Power station (n) trạm phát điện



LISTENING
The first picture shows an algal bloom in coastal seawater.
Describe what you see in the pictures and talk about the
relationship between them.
- The second picture shows the cooling towers from a power station.
They are both related to thermal pollution.
Listen and check your answers.
Nội dung bài nghe:
Reporter: Does thermal pollution mean that bodies of water get hotter, Mr Nam?
Mr Nam: Not always. Sometimes the water becomes colder, and that’s also thermal pollution means a change in the water temperature.
Reporter: That’s interesting! What causes?
Mr Nam: Power station are one factor. They use water in the nearby lakes or rivers to cool their equipment, which heats up the water. Then they dump the hot water back into its source.
Reporter: Are there any other causes?
Mr Nam: Yes. Thermal pollution may also happen due to the discharge of cold water from reservoirs into warm rivers.
Reporter: Thermal pollution can have dramatic effects. Right?
Mr Nam: Certainly. Most aquatic creatures need a certain temperature to survive. Warmer water has less oxygen in it, and this can harm fish populations. Besides, warmer water can cause harmful algal blooms. This can change the colour of the water like in the first picture and, more seriously, the algae poisons the fish.
Reporter: What can we do, Mr Nam?
Mr Nam: In many places, they build cooling towers like in the second picture to cool down the water from power stations.
Reporter: Anything else we can do? ...
2. Listen to part of a conversation on TV between a
reporter and an environmentalist about thermal pollution.
Complete the diagram. Use no more than three words for
each blank.
hotter
cooler
cool
warm rivers
Warm water
fish populations
Harmful
color
poison
cool down
WRITING
3. Work in pairs. Discuss the causes and effects of one type of pollution in your area. Make notes in the diagram.
………………………. pollution
Definition: ………………………
EFFECTS
………………………
CAUSES
………………………
Air pollution
Definition: Air pollution occurs when the air contains gases, dust, fumes or odour in harmful amounts.

Causes: industrial waste, exhaust from cars and plane…

Effects: causing diseases, death to human, damage to other living organisms such as animals and food crops, or the natural or built environment.
4. Imagine that you two are writing an article for the local newspaper about a type of pollution in your area. One of you writes about the causes and the other writes about the effects of the pollution type you have just discussed in 3.
5. Read each other’s work and put them together
to make a complete article.
Air Pollution
Air pollution is now a serious problem for those living my area. Air pollution may be any industrial waste, gases , dust, fume or odour in harmful amounts which are harmful for man, vegetation, animals or buildings.
Air pollution can have some different causes. The major source of air pollution is industrial waste from factories. The second is exhaust from cars, motor vehicles and planes...Agricultural activities as crop spraying with pesticides and herbicides are another one.
Air Pollution can have dramatic effects. It causes various dangerous diseases, death to human, damage to other living organisms such as animals and food crops, or the natural or built environment. The buildings look dirty.
So, what should we do to reduce air pollution?
Suggested article
HOMEWORK
Learn by heart vocab.
Rewrite the article and do exercises E1,2 ( PAGE 10-
workbook).
Prepare part : LOOKING BACK & PROJECT
Thanks for your attendance!
Goodbye. See you again