Te 8 ruscha indd

71

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LESSON 3 Our green planet
1
a
1
b
W o rk in p a irs. Read and an sw e r th e q u e s tio n s .
1) How long does it take to grow a tree?
2) Where is the oldest tree in the world? How old is it?
Read and c h e c k y o u r answ er.
For a tree to reach full growth, it needs good climate and 
enough water. In tropical climates with warm weather and a 
lot of water, a tree can become fully grown in 30 years. A tree 
in cooler regions may take several hundred years to reach full 
growth. The oldest tree in the world is a Great Basin pine in 
California, which is approximately 5,064 years old.
2
W o rk in p a irs . Read and an sw e r th e q u e s tio n s .
— Put th e v e rb s in th e c o rre c t fo rm .
What is used to make paper? Is this process environmentally friendly?
a) Trees as “ raw material” are (1) ... (use) to 
make paper. Trees (2) ... (be) cut down and 
we do not always (3) ... (plant) enough new 
trees to take their place.
b) We use machines to cut down trees and (4) 
... (transport) them to the factory.
3 a
W o rk in p a irs. A n sw e r th e q u e stio n s.
1) Do we use less or more energy and 
materials to recycle paper?
2) Why is it important to recycle paper? 
^
3) Is it more or less dangerous for the nature?
3 c
~ 
W ork in sm all g ro u p s . Listen again and 
i V a n sw e r th e q u e s tio n . Add m ore ideas.
What can children do to help save trees? 
e .g . We can reuse paper and write on the other side of 
it. We can reduce paper use if we read newspapers 
and magazines online or in the library.
4 b W o rk in p a irs o r in g ro u p s . Read and say w h ich
a d vice is th e m o st u s e fu l. W hy? 
e .g . Rechargeable batteries are more 
expensive than usual batteries. But we 
should use rechargeable batteries more 
often because they are nature-friendly if 
we want to help nature.
1) Keep a large bottle of water at home 
and use a glass instead of buying individual 
bottles of water. If you must buy a single-use 
plastic bottle while out, make sure that the 
empty bottle goes to the recycle container 
instead of the garbage can. If you do not 
like the taste of your tap water, you can use 
an inexpensive filter.
2) Never put liquid medicine or other che­
micals to a toilet. They kill up to 80% of useful
c) Trees are (5) ... (chop) into pieces. 
This process (6) ... (need) energy.
d) In the process a lot of water and 
chemicals (7) ... (be) used. About 
half of each tree (8) ... (be) wasted.
e) Poisonous wastes are (9) ... (throw) 
into the rivers and lakes which causes 
pollution.
f) Transport (10) ... (be) used to take the
paper to faraway places. Transpor­
tation (11) ... (take) much energy.
3b 
Listen and ch e ck.
4 a Liste n and re p e a t th e
new w o rd s .
bacterium
(pl bacteria),
rechargeable, 
battery charger