gizmo_2655 wrote on Feb 19
th, 2011 at 8:08am:
IF there isn't any proof that this hasn't happened before then AGW is NOT a viable concept...
Flawed how?? Is there one single part of current climate change that hasn't happened before??? No there's not....
So if the same actions have happened due to natural causes in the past, then there isn't any way say it's man caused THIS time...
Going back to the analogy it's the fact that the knife is in the chest and we know that if you are stabbed through the heart with a knife , your pulse was quite normal beforehand and no pulse after, then there is a 99%+ chance that it was the act of being stabbed through the heart that killed Colonel Mustard.
In the same way, we know that CO2 in the atmosphere causes the Greenhouse Effect (the CO2 molecule has the property of absorbing LW Infrared radiation etc). We know that the CO2 has been increasing as a result of activities such as cement manufacture and fossil fuel burning, and there is a 99% + chance that this is what is causing the increase in mean global temperatures.
Of course we know that colonels might have died from natural causes in the past, and we know that there have been perturbations of the climate in the past, but in both cases, the evidence is equally compelling.
Ok, lets go back to your Colonel Mustard anaolgy......but delete the knife from the equation...
So we have Colonel Mustard lying dead on the floor........was it natural causes or human action????