The challenge now is to produce energy from high-sulfur coal just as cleanly, but at a much lower cost.

There's technology out there that can make burning high-sulfur coal safe, but Congress doesn't seen to want to take the time to develop it.

It has large reserves of high-sulfur coal in the Midwest, however.

But they still have the problem of the Midwestern high-sulfur coal to deal with.

Many Illinois power plants are not equipped to burn high-sulfur coal.

That is one reason many utilities use high-sulfur coal, a major cause of air pollution and acid rain.

Stiff opposition is to be expected, certainly from states producing high-sulfur coal.

Natural gas is almost free of sulfur, and utilities are turning to that fuel, in some cases, to replace high-sulfur coal.

A number of states are putting pressure on power producers to buy high-sulfur coal from local mines.

The changes could cost jobs in states like West Virginia that produce high-sulfur coal.