Signa said:
There is no way to tell if what we are measuring is truly our fault.
Actually there is a way. CO2 from human activities has a distingt age, because they are burned fossil fuels, 100's of millions of years old. Using carbon-dating we can determine how much CO2 in the air is from burned fossil fuels, and CO2's heat-absorbing properties have also been demonstrated.
As far as I understand, solar activity has been steady for the past 30 years, but the planet has still warmed indicating that it is the greenhouse effect.
Signa said:
EDIT: I forgot to point out how I also don't trust agendas with a lot of cash behind them. I remember Penn and Teller doing an episode on going green. Al Gore's motives behind the movie was hardly for the sake of the planet. Also, the episode lead with reading an excerpt from a magazine talking about the dangers and current effects of the warming, and how it all spelt certain and impending doom just over the horizon. They then revealed the article was written in the 70's, pointing out how these alarmist discussions have been around for decades, and we really aren't worse for wear.
Al Gore is not a scientist and his movie contains major flaws, though its overall message is correct.
Besides, are you implying that there is *less* money in the oil companies that lobby against Global Warming science? If I'm not mistaken, the oil lobby is one of the richest and most powerful in the world.
If you believe that Global Warming (the recent, rapid rise in worldwide temperatures) is something harmless and of no negative consequence to humans or our planet that shouldn't be stopped, I'd point you to Q19 of the Wikipedia article FAQ [http://en.wikipedia.org/wiki/Talk:Global_warming] and the IPCC Fourth Assessment Report (WGII). [http://en.wikipedia.org/wiki/IPCC_Fourth_Assessment_Report#Working_Group_II:_Impacts.2C_Adaptation_and_Vulnerability]