The AGW advocates always present the AGW discussion as some sort of 'vote' by scientists in which the percentage of something or other is the most important thing. TFA in this case points to a '99 percent' certainty that the world is screwed unless we do what they say. ALL of this is based on computer models of the earth's climate that have not been accurate at forecasting because of their crude modeling of the atmospheric water cycle. Water is the most important 'greenhouse' gas, by hundreds of times, due to its a) prevalence, and b) massive greenhouse effect. But...the AGW advocates ignore the effect of water with their general assumption that a)it's always been there and b) always will be there, and c) does not change and focus all of their attention on carbon dioxide and the hawaiian concentration measurements showing a steady atmospheric increase. However, they completely ignore the carbon cycle. ALL of the carbon that we are exploiting was in the atmosphere in the past and was eventually 'sequestered' through natural processes that continue to this day. ALL of the carbon currently in the earth's crust will eventually be released into the atmosphere, either by the actions of man or by natural processes. For example, there are thousands of locations around the world where hydrocarbons (primarily ch4 but larger hydrocarbons as well) are naturally released into the atmosphere continuously. ALL of the carbon currently in the atmosphere will eventually be returned to the earth's crust. Carbon is constantly being cycled into and out of the earth's crust. Man's exploitation of hydrocarbons are just part of the cycling out of the crust. Moreover, there is absolutely zero evidence that the carbon concentration in the atmosphere is a constant value but rather has obviously changed dramatically over time. The earth's climate may warm over the next century or it may cool (through change in solar output) but there is nothing that we are going to do that is going to change it even 0.1 C. Politically, however, this is an enormous issue because new laws driver by AGW fearmongers will potentially give governments much more power than they already have over the distribution and use of energy. In the United States, we have already seen the beginnings of regulation of carbon dioxide 'pollutant' emissions.