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Powerpoint Description:

This slideshow covers: the Earth's atmosphere and its composition, how the atmosphere has evolved, changes in oxygen and carbon dioxide levels, formation of oil and gas, global warming, the greenhouse effect, problems associated with human activities and pollution, possible effects of climate change, carbon footprint, ways to reduce a carbon footprint, pollution, formation of types of pollution such as carbon dioxide, carbon monoxide, sulfur dioxide and nitrogen oxides.

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