Wall Street Journal: Big industry calls it the future. Al Gore suggests it’s a fantasy. Whatever the truth about “clean coal,” consumers will be paying for it one way or another. Coal, more than any other fuel, powers the planet. It is the primary source of electricity in dominant economies from the U.S. to China to Germany. In all those places, coal is cheap and, unlike oil, domestically plentiful. Its use is rising, particularly in developing countries that soon will consume more energy than the …