This cost/benefit argument is a false one as well - Where does the money go? Where does it come from? It's not all government funds being collected off the populace and buried underground. All the money goes into developing existing and new forms of technology to do what we do currently but better. That means new jobs and a boost to the economy - not the opposite. In addition it means that there will be a number of products that will be developed with environmental issues in mind. These will be freely tradable (and desirable) in the countries under the Kyoto treaty. Those countries outside will find their more polluting products harder to sell.
Do I believe that global warming could happen? Yes I do. Greenhouse gasses do trap solar energy. That the amount of solar energy coming directly from the source has a greater effect is important, but it doesn't negate the fact that greenhouse gasses (CO2, Methane, CFCs etc) all have a warming effect. I like the warm - If my home country had been warmer, I might never have left it - but I'd like to see us attempt to build a future where we have a greater chance of dealing with this issue if it ever does become a problem (i.e. when the solar luminance cycle turns round and we REALLY start warming up) and the best way to do that is to develop the appropriate technologies. The best way to do that is to skew the international market in favour of non-polluting technology. It really isn't complicated at all.
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