Mission Impossible1 AModule English Toolkit 1 - Natural Sciences In the early 1970s, scientists discovered that a type of chlorine containing industrial chemicals called halocarbons was
Trang 1Mission Impossible
1 AModule
English Toolkit 1 - Natural Sciences
In the early 1970s, scientists discovered that a
type of chlorine containing industrial chemicals
called halocarbons was harmful to the ozone
layer The most commonly used halocarbons
are chlorofluorocarbons (CFCs) CFCs are
stable, non-toxic and inflammable compounds
These qualities have made them very attractive
for industrial use In fact, they have numerous
applications Unfortunately, they are also the
major contributors to the depletion of the ozone
layer and consequently need to be eliminated
Over the years, Greenpeace has maintained
that it is possible to meet all the human needs
that have been serviced by ozone depleting
substances without using chemicals that affect
the ozone layer or climate
In 1992, Greenpeace published two extensive
Making the right choices which surveyed the
then existing alternatives to CFCs and other
ozone depleting chemicals
The development of the world’s first ozone
safe technology for domestic refrigerators
-Greenfreeze- was initiated, revolutionising the
refrigeration industry and the market
Minimum ozone levels in the Antartic have
decreased steadily throughout the 1990s and
less dramatic decreases have been found
above other areas of the world In 2000 (and
again in 2003 and 2006) the ozone hole
reached a record size, extending to an area
greater than that of North America Recovery of
the ozone layer, however, is expected to take
50 to 100 years Damage to the ozone layer
can also be caused by sulphuric acid droplets
produced by volcanic eruptions
The environment
Rubbish
We throw away millions of tons of rubbish every year This rubbish contains a variety of material which we can recycle If you empty the contents of a typical domestic rubbish bin you will find that about a third is paper and card, especially from food packaging About
a quarter of the contents will be food waste;
a tenth per cent, plastic and the rest equal parts of glass, cloth and metal
Recycling
Many of the things we throw away can be recycled Recycling can reduce pollution from certain products such as car oil and batteries It can also prolong the life of limited reserves of other natural resources such as wood It often saves energy too For example, using recycled glass, saves energy
so it is cheaper Recycling also gives jobs
to hundreds of people since new industries are created So, before you throw something away next time, stop and think!
1 Answer these questions.
a What is Greenfreeze?
b What is the advertisement warning us about?
c What makes Greenfreeze different from other technologies?
d What is destroying the ozone layer?
e What can do you do to protect the ozone layer?
Activities
Trang 21 AModule
English Toolkit 1 - Natural Sciences
2 Re-read the text and tick (3) the right choice.
4 Match the words to the
objects in the pictures
3 Read the paragraph about rubbish again and complete
this pie graph with the information provided
a The ozone layer’s most vulnerable
period
has already taken place
will take place in ten years’ time
b In 1992, Greenpeace
discovered that halocarbons were
harmful to the ozone layer
reported existing alternatives to
CFCs and other ozone depleting
chemicals
c Chlorofluorocarbons are
toxic
non-toxic
d Greenfreeze
harms the ozone layer
contributes to avoid ozone layer depletion
e According to Greenpeace, it is possible
to meet all human needs
only by harming the ozone layer without harming the ozone layer
a food waste
b paper and card
c glass
d plastic
5 What are the advantages of recycling waste?
Read the text and make a list
6 Get in pairs, look for information about products which don’t harm the
ozone layer With all the information you have collected, plan a campaign
to promote ozone layer protection You can use photographs or your own
drawings to design a poster.