Transcript UNIT 9

UNIT 9
Vocabulary
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Types of pollution
Environmental effects
Waste disposal
Recycling
Grammar and functions
• Expressing degree
• Expressing opinion
• Revision of the grammar structures
LISTENING
1-Environmental pollution is the CONTAMINATION OF THE AIR,
LAND AND WATER CAUSED BY HUMAN PRODUCTS.
2-a) CHEMICALS RELEASED BY INDUSTRIAL PROCESSES
b) EXHAUST FROM GASOLINE-POWERED VEHICLES LIKE
AUTOMOBILES,
c) REFUSE AND GASES EMITTED BY FACTORIES,
d) sewage and GARBAGE DISPOSED OF BY CITIES,
e) PESTICIDES USED IN AGRICULTURE.
3- THE AMOUNT OF RELEASED POLLUTANTS.
4- a) CONSERVATION EFFORTS, SUCH AS RECYCLING
b) NEW TECHNOLOGIES ALLOW INDUSTRY TO RELEASE
FEWER POLLUTANTS INTO THE ENVIRONMENT.
5- GLOBAL WARMING - THE HEATING OF THE EARTH’S
ATMOSPHERE AS A RESULT OF THE GREENHOUSE
EFFECT .
VOCABULARY
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
EXHAUST (FUMES)
OZONE LAYER
GLOBAL WARMING
THROW AWAY
BOTTLE BANK (RECYCLING CONTAINERS or BINS)
USING UP
HABITATS
NATURAL FOODS
ACID RAIN
WASTING
WASTE
CUTTING DOWN
TRANSLATION
• Industrial and domestic pollution HAVE/HAS
RISEN/INCREASED IN THE LAST 50 YEARS.
• Industrial air pollution includes the so-called “greenhouse
gases”, LIKE/SUCH AS CARBON DIOXIDE and CFCs … .
• BESIDES/IN ADDITION TO THESE GASES, we must not
forget sulphur dioxide and nitrogen oxides,
• WHICH RESULT IN/GIVE RISE TO ACID RAIN.
• The largest single cause of industrial air pollution is the
electricity industry, AS/SINCE ALL FOSSIL FUELS
PRODUCE, AT LEAST, CARBON DIOXIDE.
• NEW TECHNOLOGIES ARE BEING APPLIED in a few places
in order to minimize the effect of dangerous gas emissions,
• but these technologies are still very expensive and WOULD
MAKE/CAUSE THE PRICE OF ELECTRICITY Ø/TO
RISE/INCREASE .
• Air pollution CAN ALSO BE DUE TO industrial accidents.
TRANSLATION
• Two important causes of water pollution are ACID
RAIN AND THERMAL POLLUTION.
• Land pollution …. . IT ALSO TAKES
PLACE/HAPPENS/OCCURS WHEN THE INDUSTRIAL
WASTE is buried or …..
• Usually, …, AS WE HAVE SEEN, …,
• and … UNLESS WE CONTRIBUTE to reduce global
pollution AS MUCH AS WE CAN.
VIDEO: TYPES OF POLLUTION
Air pollution: 1:45-2:20
1. Main causes: TOXIC GASES & EXHAUSTS THAT ARE LED OUT
INTO THE AIR
2. Produced by :
1.
2.
3.
4.
5.
6.
INDUSTRIES
VOLCANOS
JET PLANES
AUTOMOBILES
FOREST FIRES
BURNING OF GARBAGE
3. Consequences: CONTAIN MANY HARMFUL GASES THAT
CAUSE
1.
2.
3.
4.
DISEASES IN HUMAN BEINGS
DESTRUCTION OF VEGETATION
DAMAGE TO THE STRUCTURES ON EARTH
CAN ALSO FORM ACID RAIN
VIDEO: TYPES OF POLLUTION
Water pollution: 2:20-2:55
4. Main causes: EFFLUENTS LED INTO WATER BODIES
FROM
– INDUSTRIES
– SEWAGE FROM TOWNS & CITIES
– WASHING CLOTHES & CATTLE IN WATER
BODIES
– RESIDUES OF FERTILIZERS & PESTICIDES
CARRIED INTO WATER BODIES DURING RAIN
The list of pollutants can be quite long
– OIL SPILL IN THE OCEANS HARMS MARINE LIFE
VIDEO: TYPES OF POLLUTION
Land pollution: 2:55-4:22
1. Main sources:
1.
HEAPS OF SOLID WASTE FROM
HOUSES, CATTLE SHEDS, INDUSTRIES, AGRICULTURAL FIELDS
2. It includes:
1.
2.
3.
4.
5.
6.
HAZARDOUS WASTE
GLASS
FRUIT & VEGETABLE WASTE
DEAD BODIES OF ANIMALS
OLD CLOTHES, PAPER, PLASTIC BOTTLES, CANS
EXCRETA, CHEMICALS, WOOD PIECES
3. Consequences:
1.
2.
THE HEAPS OF SOLID WASTE PROVIDE BREEDING GROUND FOR GERMS
IN ADDITION TO SPOILING THE BEAUTY AND SURROUNDINGS THEY EMIT FOUL
SMELL
4. Solutions: CONTROLLING LAND POLLUTION. WASTE DISPOSAL DONE CAREFULLY &
SCIENTIFICALLY. IT DEPENDS ON THE KIND OF SOLID WASTE:
1. CONSTRUCTING MATERIAL IS BURIED IN LAND FILLS
2. PLASTIC, TIN CANS, METAL SCRAP, PAPER MUST BE RECYCLED
3. PLANT & HOUSEHOLD ORGANIC MATERIAL SHOULD BE TURNED INTO MANURE
4. BIOGAS CAN BE OBTAINED FROM BIODEGRADABLE WASTE
5. WASTE FROM HOSPITAL & NURSING HOMES SHOULD BE BURNT IN
INCINERATORS
VIDEO: TYPES OF POLLUTION
Soil pollution: 4:20-4:57
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10.
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Difference with air pollution: LOCALIZED PHENOMENON (AIR & WATER POLLUTION
SPREADS TO LONG DISTANCES)
The two main reasons for soil pollution are:
– POLLUTANTS WASHED DOWN FROM THE ATMOSPHERE BECAUSE OF RAIN
– INSECTICIDES AND PESTICIDES APPLIED TO THE CROPS
THIS ALTER THE COMPOSITION AND QUALITY OF THE SOIL
Noise pollution: 4:57-6:00
What is noise?: ANY UNWANTED SOUND
Unit of measurement: DECIBEL (DB)
Examples: THE LOWEST SOUND = 1 db, A ROCKET TAKING OFF = 180 db. NORMAL TALK=
60db
Consequences: PRODUCE ADVERSE EFFECTS ON HUMAN BEINGS & OTHER ANIMAL LIFE
Which two aspects of noise are injurious for health? LOUDNESS and DURATION OF NOISE
Other consequences: ACUTE DAMAGE TO THE EAR DRUM, DEAFNESS, LOWERS
EFFICIENCY OF WORK, DISTURBS SLEEP, IRRABILITY
Thermal pollution: 6:00-6:25
What is thermal pollution?: RELEASE OF HEATED GASES OR WATER REPEATEDLY INTO
THE ENVIRONMENT, INCLUDING WATER BODIES
Consequences:
– IF RELEASED IN THE ATMOSPHERE THEY WARM UP THE AIR IN THAT AREA
– IF RELEASED IN WATER BODIES THEY KILL THE AQUATIC LIFE
LISTENING: GREENHOUSE EFFECT
1. A greenhouse is a building whose sides and
roof are made of glass so that the temperature
inside is magnified. And it is used to grow
plants that need high temperatures.
2. These changes result from increasing the
carbon dioxide levels in the atmosphere, thus
raising the surface temperature of the earth.
And this is known as the “Greenhouse Effect”.
3. since 1860, with a sharp increase since 1958.
4. The main reason is the burning of fossil fuels.
5. by about 15% -from about 290 to about 340
parts per million.
6. about 0.032%
LISTENING: GREENHOUSE EFFECT
7. incoming sunlight consists of many wavelengths, including
some very dangerous ones.
8. But ozone, water vapour and CO2 destroy the harmful
wavelengths. So what reaches the earth is visible light. It is
absorbed and reradiated into the atmosphere as longer
wavelength infrared (IR) radiation, or heat, as the earth cools.
9. This IR radiation is absorbed by CO2.
10. The CO2 then radiates a portion of the absorbed heat energy
back to the earth, to warm the atmosphere.
11. Like the glass in a greenhouse, the CO2 in the atmosphere
acts as a one-way filter that allows visible light to enter the
Earth’s atmosphere, but prevents longer wavelength heat
radiation from leaving.
12. Assuming that energy is arriving from the sun at a constant
rate, then as the level of CO2 increases, the average surface
temperature of the Earth should rise.
13. in 1863, but it was taken as a serious matter in 1956.
14. a projected increase in CO2 to 375 parts per million in the year
2000 could cause the average air temperature to increase by
about 0.5ºC.
LISTENING: WASTE DISPOSAL
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Which are the 4 main sources of waste? MINES (39%), AGRICULTURE (53%), INDUSTRY
(2%), DOMESTIC HOMES / WASTE (6%)
Where does it go?
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OPEN DUMPS (55%)
NOT COLLECTED OR DISPOSED OF (23%) LEFT ON THE SPOT
LAND-FILL METHOD (12%) BURIED IN THE GROUND
BURNT (9%)
DUMPED TO SEA (1%)
DOMESTIC WASTE (RUBBISH, GARBAGE)
Open dumps: advantages : EASY TO OPERATE and THE CHEAPEST OF THE 3
disadvantages: unsightly, CAUSE AIR POLLUTION WHEN RUBBISH IS
BURNT, SMELL, MATERIALS & LAND ARE WASTED and they can contaminate ...
Land fill : advantages: CHEAP, NO OBJECTABLE SMELLS OR PESTS, and when the
landfill is completed LAND MORE USEFUL THAN BEFORE (e.g. sports field or park)
Disadvantages : WASTE MATERIALS and USES A LARGE AREA OF LAND ….
Incineration (i.e. BURNING) Advantages: …about 80% OF DOMESTIC RUBBISH and
REDUCE ITS VOLUME BY 90%; it requires VERY LITTLE LAND and it produces INCOME
FROM THE RECOVERY OF WASTE METAL & GLASS
Disadvantages: EXPENSIVE TO BUILD AN INCINERATION PLANT and CAUSES AIR
POLLUTION unless sophisticated pollution controls are installed.
TRANSLATION: RESOURCE RECOVERY
• Numerous thermal processes recover energy IN DIFFERENT WAYS
FROM SOLID WASTE.
• THESE SYSTEMS/METHODS ARE DIVIDED INTO TWO GROUPS:
combustion processes and pyrolysis processes.
• A number of companies burn in-plant wastes in conventional incinerators
INORDER TO PRODUCE/GENERATE STEAM;
• THE WATER FLOWING through the tubes ALLOWS THE HEAT
GENERATED IN THE COMBUSTION CHAMBER TO BE ABSORBED
AND GENERATE STEAM.
• Pyrolysis CONSISTS OF DECOMPOSING CHEMICALLY SOLID
WASTE by heat in an oxygen-reduced atmosphere.
• THIS RESULTS IN A GAS THAT CONTAINS various gases,
DEPENDING ON THE ORGANIC CHARACTERISTICS OF THE
LYROLIZED MATERIAL
• IF USERS SEPARATED THEIR RUBBISH A LARGER AMOUNT OF
WASTE COULD BE RECYCLED and that would improve life in our planet
• … since THE GREATER THE RECYCLED VOLUME ,THE LONGER
OUR NATURAL RESOURCES WILL LAST
DEGREE
• Quantity: all/every/each | most|many/much |
some, several | (a) few/(a) little | no/none/not any
• Frequency: always| Highly, usual(ly),
normal(ly), general(ly)| often, frequent(ly)|
sometimes, occasional(ly)| rare(ly), seldom, hardly ever,
scarcely ever| never
• Certainty: certain(ly),undoubtedly,
absolutely| probably, likely|
possibly,perhaps,maybe| Uncertain,unlikely| certain(ly)
not, definite(ly) not
• Verbs: will, is/are,must,have to |should,
ought to| can,could,may,might| could not, will not, cannot,
is/are not
EXERCISE DEGREE A
Nobody else ate it.
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b.-Only he ate a bit of bread.
I want your sincere opinion.
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a.-Honestly, do you think he will get it?
To tell you the truth, she doesn´t feel like talking.
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a.-Frankly, she doesn´t want to talk about that.
We don´t want them to repeat the same action so many times.
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b.-We have told them not to do that often
Nobody else said they were going to write.
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b.-Only Mary promised to write once a month.
I don´t like them at all.
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b.-I really don´t like his parents.
Was he late?
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a.-Has he come late?
Don´t do anything else.
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a.-Just wait here.
She isn´t going to write more plays.
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a.-This is her last play.
It was a long letter
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b.-I wrote to the manager of the company at length and complained
EXERCISE DEGREE B
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We installed a complete new system
We installed a completely new system
It was a really enjoyable film
It was a real enjoyable film
The product is full guaranteed for a year
The product is fully guaranteed for a year
The new car was a closely guarded secret
The new car was a close guarded secret
He's a highly paid executive
He's a high paid executive
EXERCISE DEGREE C
1. He's a HIGHLY qualified engineer
2. It was a POORLY/ BADLY written report and it needed
a lot of corrections
3. They were VERY/ GREATLY/ HIGHLY / LARGELY
impressed by the new product. It wasn't bad at all
4. It is a HIGHLY / VERY sophisticated system
5. It is a POORLY/ BADLY structured report and difficult
to understand (opposite= WELL)
6. The prototype was POORLY/ BADLY/ ILL designed
and they had to go back to the drawing board
EXERCISE DEGREE D
1. The normal procedure is to approach the
design department
2. The exceptionalLY high price reflects the
quality of the product
POSITION OF ADVERBS
• at the beginning of a sentence:
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Unfortunately, recycling plastics has proved difficult.
Electric motors are based on electromagnetism. Similarly, generators use
electromagnetism to produce electricity
at the end of a sentence
Harmful waste should be separated and treated carefully
All biological waste must be disposed of safely
• Most frequently in the middle of a sentence (FREQUENCY,
DEGREE,) (after TO BE, before OTHER VERBS)
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recycling centers do not often recycle plastic grocery bags
e-waste recycling is an industry that hardly existed ten years ago
Ferrous metal scrap is usually sent to a local steel mill for recycling
residues sent for recycling do not always necessarily contain metals
• DEGREE ADV/ADJ: BEFORE AN ADJECTIVE/NOUN
•
Many other countries have significantly better glass recycling rates
ORDER OF ADVERBS
1. Our friends must also write a test.
2. I was only joking.
3. Did you both enjoy the flight?
4. Mary hardly ever watches TV.
5. He drives his car carefully
6. The children play football in the garden
7. Yesterday we went to the cinema yesterday
8. John almost fell off the bike.
9. Her boyfriend will probably buy her some flowers.
10. My uncle is definitely moving to Stockholm soon.
COMMON ADVERBS OF DEGREE
POSITION: before ADJ/ADV or main VB
Significantly, mostly, greatly, strongly,
substantially, dramatically ,hardly, scarcely
• This allows the weight of the system to be significantly reduced
• The data are mostly recorded digitally
• Double-shafted systems have been greatly improved by the use of new
materials
• This design scarcely requires any further machining steps
• The new systems are highly efficient
• We installed a completely new system
Likely/unlikely
• New sites for wind farms are likely to be mostly offshore
• Helium turbines are unlikely to appear earlier than 20 years from now
ADVERBS- position
1.
Plant and animal life can be greatly affected by global
warming
2. Supercharger engines achieve extremely high
performance
3. Lignite’s energy content is rather low
4. Wind power is likely to be the most widely used renewable
energy source in the future
5. Stacked solar cells significantly increase the efficiency of
solar cells
6. With a better control of CO2 emissions global warming
would never have increased
7. Organic waste material is scarcely reused
8. The efficiency of solar towers would be dramatically
improved if hot air could be used to drive a gas turbine
9. greenhouse gas emissions scarcely changed between 1990
and 2010
10. recycling materials rarely possess the required quality
EXPRESSING OPINION
AGREEING
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In my opinion…
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Personally, I think that…
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I'd suggest that…
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I (strongly)believe that…
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I'm convinced that...
As far as I'm concerned…
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I'd like to point out that…
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What I mean is…
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I'm pretty sure that
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I agree with you on this point
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SO DO I
DISAGREEING
However… / On the contrary…
Yes, but don't you think…
I'm afraid I have to disagree.
Don't you think it would be
better...
I don't agree with …..
That's not entirely true because ….
I don't think that...
The problem with that point of view
is that...
NEITHER DO I
VIDEO- STORY OF ALUMINIUM RECYCLING
1. Which are the characteristics of Aluminium? LIGHT, DURABLE, THE
MOST WIDELY USED NON FERROUS METAL
2. How much was recycled in Devon last year? 660 TONNES OF
ALUMNIUM CANS
3. Where is Aluminium collected from? KERBSIDE BINS, BOXES, BAGS,
RECYCLING BANKS
EXPLAIN THE STEPS OF ALUMNIUM RECYCLING
• AFTER THE CANS HAVE BEEN COLLECTED, THEY ARE TAKEN TO A
RECYCLING DEPOT
• IN ORDER TO SEPARATE STEEL CANS FROM ALUMNIUM, A GIANT
MAGNET IS USED TO REMOVE STEEL
• ALUMNIUM IS THEN CRUSHED AND BALED
• THE ALUMNIUM IS THEN SENT TO A REPROCESSING COMPANY
• IT IS SHREDDED INTO BITS THE SIZE OF A TEN-PENCE PIECE
• THE SHREDS ARE PASSED THROUGH A DOUBLE MAGNETIC DRUM
SEPARATOR TO REMOVE STEEL CONTAMINATES THAT MAY HAVE
BEEN MISSED
VIDEO- STORY OF ALUMINIUM RECYCLING
• BEFORE THE CANS CAN BE MELTED, THEY NEED TO BE DE-COATED
OF THE VARNISH LACQUER WHICH IS USED DURING
MANUFACTURING TO PROTECT THE CANS
• THIS IS REMVED BY BLOWING HOT AIR THROUGH THE SHREDS
• THE HOT, DE-COATED CANS CAN THEN BE FED INT A HUGE 90
TONNE FURNACE TO BE MELTED
• NEXT THE MOLTEN METAL IS CAST INTO INGOTS. THIS IS ACHIEVED
BY TILTING THE FURNACE AND POURING THE MOLTEN METAL INTO
A CASTING UNIT
• AFTER BEING CAST AND CHILLED, THE ALUMNIUM INGOTS ARE CUT
SQUARE AND SENT OFF TO THE MILL, WHERE THEY ARE ROLLED
OUT INTO SHEETS
• THE SHEET ALUMINIUM IS SOLD ONTO MANUFACTURERS FOR A
RANGE OF USES
Give examples of use of recycled aluminium
• CAR PARTS, SUCH AS ALLOY WHEELS, BIKES, PACKAGING (eg FOIL &
CANS), CONSTRUCTION PARTS, HOUSEHOLD APPLIANCES
ALUMINIUM RECYCLING- REORDER
1 Aluminum cans are gathered from recycling centers
6 They are sent to a scrap processing company where they are
collected into large bales.
3 The bales are then sent to an aluminum company where the cans are
shredded, crushed, stripped and burned
7 They are then sent into a furnace where they are melted with new,
untouched aluminum and the two are melted together.
5 The new aluminum is then poured out into sheets, and cut down into
sheets 1/100th of an inch thick.
2 The aluminum then cools, and is coiled up into large rolls and sent to
can makers.
4 The can makers then mold the aluminum into can shapes, and send
them off to soda makers to bottle their beverage.
VOCABULARY
• ENVIRONMENTAL H_________ (great danger or risk)
ENVIRONMENTAL HAZARD (ADJ = HAZARDOUS)
• WASTE D _________ (or waste management)
WASTE DISPOSAL
• To DISPOSE _________ (preposition)
To DISPOSE OF
• UNTREATED S _________ (waste water)
UNTREATED SEWAGE
• REFUSE = GA ______, TR _____, R _____ & L ______ (4 synonyms)
REFUSE = GARBAGE, TRASH, RUBBISH & LITTER
• OIL S _________ (accidental release of oil in the sea)
OIL SPILL
• DEMAND _________ OIL (preposition)
DEMAND FOR OIL
• NATURAL R _________ (natural materials)
NATURAL RESOURCES
VOCABULARY
• ENERGY CON________ ( = use)
ENERGY CONSUMPTION
• THE OZONE L ________
THE OZONE LAYER
• POLAR ICE C ________
POLAR ICE CAPS
• OPEN D ________ (site to dispose of urban waste)
OPEN DUMP
• To BE AWARE ________ (preposition)
To BE AWARE OF
• TH ________ = menace, peril
THREAT (VB = THREATEN)
• TO RUN ________ (to end)
TO RUN OUT
VOCABULARY
• TO BE A______ OF (to be concern about)
TO BE AWARE OF ( N= AWARENESS)
• METAL RE ______ (recuperacion de metales)
METAL RECOVERY
• E ______ FUMES (from cars)
EXHAUST FUMES
• ENV ______ FR ______ PRODUCTS (green)
ENVIRONMENTALLY FRIENDLY PRODUCTS
• POL ______ (contaminating substances)
POLLUTANTS
• TREES ARE D _____ and SOME ARE already D _____ DUE TO
ACID RAIN (morir)
TREES ARE DYING and SOME ARE already DEAD (N = DEATH)
VOCABULARY
• REC________ (= reuse)
RECYCLING
• Industries R_______ gases to the atmosphere (= to emit gases)
To RELEASE gases
• TO BE CONCERNED ________ (preposition)
TO BE CONCERNED ABOUT
• PRO ________ (= manufacturers)
PRODUCERS
• To CARE ________ (preposition)
To CARE ABOUT
• UN ________ HY ________ (hidrocarburos sin quemar)
UNBURNT HYDROCARBONS
• CHRISTMAS C ________ (Xmas song)
CHRISTMAS CAROL