100 years ago, the majority of scientists, politicians, and even some Nobel Prize winners supported eugenics. 1000 years ago, the same majority accepted that the world was flat. And 10000 years ago, most people probably thought that there was nothing outside of their continent. You are using argumentum ad populum. A good proportion of American citizens believed, just three years ago, the Saddam Hussein had direct involvement with 9/11. Also have you stopped to consider the enormous cost of the Kyoto Protocol? (
http://www.junkscience.com/MSU_Temps..._Count_Up.htm). As of this post, more than US$ 242,049,412,576 has been lost to this Protocol in the globe economy. All to reduce temperature by 2050 by 0.002510145 °C. It would cost 100 trillion US$ to lower the Earth's temperature by ONE degree by 2050. All this, on a problem that may not even exist?
Also, haven't people been predicting the end of the world for millenia? Can you cite even one example where it has come true? Not one?
EDIT: Also, I'd like to see a source for that 90% figure.