2. Climate change is any long-term significant change in the “average weather”. Average weather may include average temperature, precipitation and wind patterns. Global climate change is caused by the increase of greenhouse gases in the lower atmosphere. The global concentration of these gases is increasing, mainly due to human activities, such as the combustion of fossil fuels (which release carbon dioxide) and deforestation (because forests remove carbon from the atmosphere). Definition of Climate Change
3. Where in the world is Climate Change critical? Climate change basically effects everyone around the world. However there are some countries and areas that are greatly exposed. Antarctica is one of the places where there is a hole in the ozone. However luckily no one lives permanently in Antarctica. This however doesn't mean it doesn't have a negative effect. The increase in levels of UV radiation reaching the surface of the Earth will mean that eventually the ice will start melting and sea levels will rise. Other countries exposed are countries such as Australia and New Zealand. There is now a hole in the ozone layer over these countries which means the people living in these countries will experience the most effect in the long term and also in the short term.
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7. This figure illustrates the basic components that influence the state of the Earth's climatic system.
