Some
people believe that human activities in industrialised countries are changing
the world’s climate and the natural greenhouse effect is being altered.
But
global warning is a controversial issue. Some people argue that it is not
happening because throughout History there have been natural cycles of warming
(eg. the Medieval Warm Period) and cooling on Earth (eg. the Little Ice Age
between the 11th and 15th centuries).
What do
you think about it?
Watch this
video from National
Geographic and do a small research on the web. Them, answer the following
questions as complete as possible:
-
Describe 3 possible impacts of
global warming and how people can try to slow down its impact.
-
Why are people uncertain about the
causes of global warming?
-
Are you in favour or against the
theory of Global Warming? Explain it and give reasons.
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