Dirty Coal, Clean Future

Full Article: http://www.theatlantic.com/magazine/archive/2010/12/dirty-coal-clean-future/8307/1

Snippet:

"Recall the 37 billion tons of worldwide annual carbon-dioxide emissions. On a per capita basis, that would mean about six tons for each of the planet’s 6-billion-plus people. But of course it doesn’t work that way. For the United States, emissions are about 25 tons per person. For Europe as a whole, they’re about 11 tons.... Japan’s level is slightly below Europe’s. For China, the emission level is about eight tons per person... India’s per capita emission level is about three tons per year, less than half of China’s (because India has so many fewer factories). For Kenya and other barely industrialized countries, it’s about one ton per person per year.

The range of these figures suggests the technical challenges ahead. As one climate scientist put it to me, “To stabilize the CO2 concentration in the atmosphere, the whole world on average would need to get down to the Kenya level”—a 96 percent reduction for the United States."

"Coal will be with us because it is abundant: any projected “peak coal” stage would come many decades after the world reaches “peak oil.” It will be with us because of where it’s located: the top four coal-reserve countries are the United States, Russia, China, and India, which together have about 40 percent of the world’s population and more than 60 percent of its coal. It will be with us because its direct costs are in most circumstances far lower than those of the alternatives—that’s why so much is used. (Prices vary widely from place to place and company to company, but one utility executive said that the lowest-price coal plant might generate electricity for 2 cents per kilowatt-hour, while the same amount of power from a new wind farm in the same area might cost 20 cents.) It will be with us because its indirect costs, in miner deaths, environmental destruction, and carbon burden on the atmosphere are unregulated and “externalized.” Power companies that answer to shareholders or ratepayers have a hard time justifying a more expensive choice. “Coal is so cheap because its dirtiness still doesn’t count against it,” an air-pollution expert with the Natural Resources Defense Council told The Wall Street Journal 10 years ago. In the absence of climate legislation in the United States and international agreements to reduce emissions, the dirtiness still doesn’t count. Coal will be with us because changing a power infrastructure—like building a new transportation system or extending cable or fiber-optic connections through an entire country—is the very opposite of a “virtual” process, and takes many years to complete."

"[Coal] will be with us because of a surprising constraint: after a century in which medical diagnosis and treatment, computer and communications systems, aerospace and nanotech industries, and nearly every other form of technology have routinely achieved the magical, energy production is essentially what it was in the time of James Watt. With the main exception of nuclear-power plants and the hoped-for future exception of practical nuclear-fusion systems, we mostly create electricity by burning something that was once underground—coal, oil, natural gas—to boil water and turn turbines with the steam. (Windmills use the wind’s force, and hydropower systems use falling water, to turn turbines directly.) The computer of 10 years from now will be unrecognizably more powerful than today’s, and its predictably increased capability will make medical, navigation, and other systems better, too. If the power plant of 10 years from now is even slightly more efficient than today’s, that will be a major achievement. The most advanced of today’s “ultra-supercritical” coal-fired plants, which operate at very high temperatures and pressures to maximize the efficiency of combustion, convert up to 48 percent of the coal’s potential energy to electric power; the rest is lost as heat. “Subcritical” plants typically have efficiencies in the mid-30s. The costliest and most advanced technology is an improvement—but not a breakthrough. A breakthrough is what it would take to move beyond reliance on coal."