You cant just ask that question with nothing else. I believe that everyone who does believe in it only do so based on what they've heard. The so called "facts".
This is a scientific conversation and so would need the believers to provide the proof to support their end of the story, and the non believers to do the same.
In all honesty, similar to what I said in the other thread, this planet has been here much too long, and we've been here too short of a time, to accurately measure something like that yet.
Based on modern studies though, it appears that global warming, the trend of rising and lowering CO2 levels, as well as rising and lowering planetary temperatures over so many years, coinciding with the suns cycles, is completely normal and natural. In fact, the planetary temperatures are actually dropping or have stayed the same for the last 15 years. That much IS a fact.
So much for global warming as the politicians would have you see it.. :p
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