IELTS Preparation Series 1, Episode 6: Greenhouse Gases
(Bấm vào đây để xem/nghe bài kế tiếp)
Xem lời thoại bên dưới:
0:14
Hello. I'm Margot Politis. Welcome to Study English, IELTS preparation.
0:20
Today we're going to talk about the environment. Global warming is caused by the presence of
0:26
greenhouses gases in the atmosphere. One of the worst greenhouses gases is carbon dioxide.
0:32
We're going to look at the language of cause and effect while we find out why these greenhouses
0:38
gases are a problem.
0:40
The main problem is our use of fossil fuels. So what we've done is put the whole natural
0:46
system out of balance by digging up coal and oil that took about 200 million years to accumulate
0:50
and we're releasing it all in about 100 years. So it's put the whole system out of balance
0:57
at the moment, which has resulted in higher levels of these gases in the atmosphere.
1:03
That was Dr Roger Francey talking about the natural system. He says that the natural system
1:09
is out of balance.
1:12
He also talked about the causes and effects of this.
1:15
Listen for the main cause of the natural system being out of balance.
1:20
The main problem is our use of fossil fuels.
1:25
He says: The main problem is our use of fossil fuels.
1:30
So if we look at a table of cause and effect, we can say that the use of fossil fuels is
1:37
a cause, and the natural system out of balance is an effect.
1:43
Listen again.
1:44
The main problem is our use of fossil fuels. So what we've done is put the whole natural
1:51
system out of balance by digging up coal and oil that took about 200 million years to accumulate
2:01
and we're releasing it all in about 100 years.
2:01
So the natural system has been put out of balance by people digging up and burning coal
2:07
and oil. This releases gases into the atmosphere. Coal and oil are fossil fuels.
2:13
So if we go back to the table of cause and effect, we can say that digging up and burning
2:20
coal and oil is another cause.
2:23
See if you can hear another effect.