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No. Other gases can absorb infrared radiation and contribute to greenhouse warming. These include methane, ozone, CFCs chloroflu cheap watches michael kors orocarbons and nitrous oxide released by fertilisers. Methane is the most important of these. Its atmospheric concentration has more than doubled since preindustrial times. Methane sources include bacteria in paddy fields, cattle guts and natural gas from landfills and rotting vegetation. Molecule for molecule, other substances are even more potent greenhouse gases. A single molecule of either of the two most common CFCs has the same greenhouse warming effect as 10,000 CO2 molecules.

Yes, volcanoes. When Mount Pinatubo erupted in 1991, it threw masses of sulphate particles and dust into the stratosphere that partially shielded the Earth from solar energy. Computer models successfully predicted that the debris would temporarily cool the Earths atmosphere. The models also predicted that as the volcanic debris cleared in 1992 and 1993, average temperatures would swiftly return first to the level of the 1980s, and then, by the mid1990s, to the higher levels expected with the cheap watches michael kors ongoing buildup of greenhouse gases.

As rainfall patterns alter, rivers will dry up in some regions, while others will flood. Rising sea levels will wipe out many islands and flood lowlying areas, from Bangladesh to the US. As ever, the poor will be mo cheap watches michael kors st vulnerable. At least in the early decades, rich nations may cope, but ultimately even they could be undermined. Human civilisations have developed over the past 10,000 years since the end of the last ice age in an era of generally stable climate. We just do not know how well we will cope with a radical change to the climatic status quo. cheap watches michael kors