A Point of View 2

global warming. It is worth looking at just a few of these in order to appreciate their interrelatedness:                                                                                                          

*With rising temperatures, methane will, of course, continue to be released from melting permafrost peat bogs (perhaps as much as 70,000 million tons of the stuff). But it is also known that there are vastly greater amounts of methane trapped as methane clathrate deposits beneath sediments on the ocean floors. Since methane clathrate actually occurs in the form of ice, a rise in sea temperatures could trigger a sudden release of marine methane. But the scale of this would be immense and almost apocalyptic in outcome, resulting in a 5ºC rise in temperatures globally. It has been hypothesized that it was just such a scenario which led to the mass extinction event that occurred during the Permian-Triassic age.

*Talking of the oceans, something else that is likely to occur with global warming is a diminution in the capacity of this vast sink for carbon dioxide to actually absorb this greenhouse gas, resulting in increased levels of carbon dioxide, and therefore in higher temperatures. Raised CO2 levels are also likely to cause acidification of the oceans, which will in turn detrimentally impact on corals and other marine organisms.  

*It is also the case that water vapour, which is by far the most potent greenhouse gas, accounting for something like 36% to 66% of the greenhouse effect, will become more concentrated as temperatures rise; something which is likely to result in turn in to a further raising of

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