Drek said:You can have clean coal.
The problem with coal is that you have variable sulfur content. Higher sulfur is obviously worse for the environment. That is basically the only level to which it is regulated however.
Interestingly in this country much of the high sulfur coal we burnt for decades comes from the beltway, states like Illinois. Low sulfur coal comes from the west, states like Wyoming.
So what most coal burning plants did to meet new "environmentally friendly" regulations was to simply buy all their coal from the western mining companies. There is still plenty of coal in the ground throughout the beltway, it just has a higher sulfur level.
How does this connect with the concept of clean coal? Well air scrubbers were developed decades ago and are even more refined today that can clean the expelled air of not just sulfur impurities but many other environmental hazards as well. They aren't required as long as a plant just runs low sulfur coal though so the majority of the industry is unwilling to invest in truly clean coal technology.
This is one of the biggest reasons I'm a strong Obama supporter. His energy policy includes this, rewarding companies who invest in going green (like clean coal). It will lead to improved and refined technology that improves effectiveness and reduces cost. Applying this attitude across the board can only help this country.
Thats interesting stuff about the sulfur content. I have been meaning to learn more about the energy industry, I even bought that book, The Prize, but haven't read it yet. Someday. :lol