First of all, ACES promotes the use of clean energy technology through a combination of mandates and subsidies. The effect of these mandates and subsidies would be to deemphasize the use of coal in favor of renewable energy resources. Now, the primary problem with coal is that it releases CO2, which, as you noted, is not a toxic pollutant. However, burning coal also releases a bunch of other stuff that is toxic and by reducing the amount of coal we burn, we would also reduce the number of pollutants that are released by the burning of coal. So Schauer was actually correct to make that statement.

Second of all, your link to the post on global warming ignores the fact that global air and ocean temperatures have been increasing at what appears to be historic rates, as well as the fact that ocean levels are rising and the Arctic ice cap is shrinking. The evidence that the globe is warming is mountainous and undeniable. Furthermore, as this apparently historic rate of increase of temperature has coincided with the rise of human-caused CO2 emissions, it seems highly probable that the globe is warming at least in part due to human activity. Of course, this is not certain, but the overall body of evidence suggests that it is highly likely that humans are at least part of the cause of global warming.

Also, there is a simple scientific reason that Arctic temperatures aren't increasing. That reason is that when a compound (in this case, the water in the ice caps) melts, the compound is absorbing the surrounding heat. And heat energy that causes something to melt actually doesn't raise temperatures during the melting process. Only after the substance melts will its temperature begin to increase.