See if you can follow my reasoning here. If I am wrong, I would like concrete reasons as to why I am wrong. Let's say that the predictions are correct, and the atmospheric CO2 levels by the year 2100 are 800 PPM, double of what we have now. I have no reason to doubt this. Based on the temperature record of the last 137 years, where the CO2 level has gone up roughly 72%, the likely atmospheric temperature increase would be about 1.2 degrees celsius, and there are a number of people who believe this. (However, during the Cretaceous period, a doubling of CO2 only resulted in an increase of 0.6 degrees Celsius, and there are some skeptics who think that this is what would happen again.) This is not enough to melt the polar ice caps, which is the doomsday scenario some have predicted. However, the IPCC predicts a different temperature increase, giving a range anywhere from 1.5 to 4.5 degrees, with the average being about 3 degrees. Again, not sufficient enough to melt the polar ice caps. However, if we take the upper figure to be true, then we are indeed in danger of melting the polar ice caps, but I have read from multiple sources that it would take thousands of years for the polar ice caps to melt. This would give us plenty of time to remedy the situation, and we do have remedies. It is almost certain that we will have nuclear fusion by the mid 21st century, and therefor we could phase out fossil fuels as much as we need to. There is also this thing called Iron Fertilization that would allow us to remove CO2 from the atmosphere. Therefor I see no reason to panic, nor any reason to impose onerous energy taxes that would make energy unaffordable to many, nor any reason to impose any other kind of government mandate. At least not in the short term.