Read this paragraph and answer the question below.
Al Gore focuses on the trend towards global warming and says that the earth is getting hotter very quickly. Gore presents evidence that links fluctuations in the earth's temperature and climate changes to causes such as air pollution and increased carbon dioxide in the earth's atmosphere. However, some scientists say that the earth's temperatures have always fluctuated, and that serious changes could take many more years. Clearly however, the main issue here is that we should all be focusing on what we can do to prevent global warming.
To see an extract from Gore's movie about global warming, go to
http://www.aninconvenienttruth.com.au/truth/trailer.htm
What is the main message of this paragraph? Choose ONE correct answer.
