| In recent years it has become clear that man's use of fossil fuels is likely to have a major impact on the world's climate. As a result of this, increased concentrations of 'greenhouse' gasses such as carbon dioxide and methane will lead to global warming; an overall small increase in average temperatures; whose impact is difficult to predict. Whilst some scientists predict melting of the polar icecaps, and so a rise in sea levels, others think this will be balanced by increased precipitation at the poles. |
| 1. If we go on using fossil fuels at the present rate, we must expect climatic change. |
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| 2. Depletion of the ozone layer will result in global warming. |
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| 3. Scientists are all agreed that use of fossil fuels will eventually lead to a rise in sea levels. |
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| 4. The burning of fossil fuels increases the concentration of methane in the atmosphere. |
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This is a test of your skill at finding similarities and differences in groups of patterns.
All the patterns in group A are in some way similar to each other, and all those in group B are similar to each other. |
