Year 11 Senior Geography Essay - New South Wales, Australia. Mark: 20/20 (A).

Global warming is the progressive gradual rise of the earth's surface temperature thought to be caused by the enhanced greenhouse effect and responsible for changes in global climate patterns. The greenhouse effect is a term used to describe the roles of water vapour, carbon dioxide, and other trace gases in keeping the Earth's surface warmer than it would be otherwise. The diagram below shows the greenhouse effect:

These "radiatively active" gases are relatively transparent to incoming shortwave radiation, but are relatively opaque to outgoing longwave radiation. The latter radiation, which would otherwise escape to space, is trapped by these gases within the lower levels of the atmosphere. The subsequent reradiation of some of the energy back to the surface maintains surface temperatures higher than they would be if the gases were absent. There is concern that increasing concentrations of......

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Title: Global Warming
Approximate Word Count: 1443
Approximate Pages: 6 (250 words per double-spaced page)

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