From portlandtransport.com
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GLOBAL WARMING NEWS
Global warming is caused by the build up of gases in the atmosphere such as carbon dioxide and methane, which form a sort of blanket over the Earth, trapping in heat that would normally escape the atmosphere. The leading greenhouse gas... [more]
Global warming is caused by the build up of gases in the atmosphere such as carbon dioxide and methane, which form a sort of blanket over the Earth, trapping in heat that would normally escape the atmosphere. The leading greenhouse gas is carbon dioxide, a pollutant emitted from the burning of fossil fuels, such as coal, oil, and natural has. While it is true that there has always been some natural climate variability, the changes that are currently underway are unlike anything that has been seen before. Record levels of carbon dioxide are having a far reaching change over our weather, sea levels, and climate.
This is not a web site for debating global warming. If you are interested in greenhouse gases, and the relative radiative forcing of each, and the (very important) amount of time a particular gas sticks around in the atmosphere once emitted, start with this Wikipedia summary primer on Greenhouse Gases:
http://en.wikipedia.org/wiki/Greenhouse_gas
Meanwhile, we can talk about the RTP. For a more detailed rebuttal of JK's oft-repeated...
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