...China's roads are some of the world's most dangerous. A quarter of a million people die on them each year—6 times as many as in the United States, even though Americans possess 18 times as many cars... ...Among the planet's 193 nations, [China] is now first in production of coal, steel, cement, and 10 kinds of metal; it produces half the world's cameras and nearly a third of its TVs, and by 2015 may produce the most cars. It boasts factories that can accommodate 200,000 workers, and towns that make 60 percent of the world's buttons, half the world's silk neckties, and half the world's fireworks, respectively... ...China is by a wide margin the leading importer of a cornucopia of commodities, including iron ore, steel, copper, tin, zinc, aluminum, and nickel. It is the world's biggest consumer of coal, refrigerators, grain, cell phones, fertilizer, and television sets. It not only leads the world in coal consumption, with 2.5 billion tons in 2006, but uses more than the next three highest-ranked nations—the United States, Russia, and India—combined... ...China overtook the United States as the world's leading emitter of CO2 in 2006, according to the Netherlands Environmental Assessment Agency... ...One indication is that China's 10 percent growth rate takes no account of the environmental devastation the boom has caused. In June 2006, an official at China's State Council said environmental damage (everything from crop loss to health care costs) was costing 10 percent of its gross domestic product—in other words, all of the economy's celebrated growth. Vaclav Smil, a highly respected China scholar at the University of Manitoba, pegs the environmental-damage rate at between 5 and 15 percent, with 7 percent a "solid, defensible figure." Smil says that shorn of hype, China's growth rate is also likely 7 percent, "so basically every year environmental damage wipes out the gdp growth."... ...particulate matter from Asia accounts for 4 to 6 micrograms per cubic meter of air—already approaching half of California's annual average pollution limit of 12 micrograms. "The problem is going to be that the ability to emit any sort of pollution from any industry here in California will be reduced because of federal regulations," Cliff said. "There could be a day when essentially the entire regulatory limit is met" by Asian pollution... The largest source of that pollution is the billion tons of coal China burns per year, more than virtually all the world's developed nations combined... By 2005, China's sulfur-dioxide emissions were nearly double those of the United States—and they are estimated to have grown by 14 percent since. Coal has also made China the world's leading producer of human-caused mercury emissions, accounting for 30 percent of the global total and rising. A 2004 peer-reviewed study found that up to 36 percent of man-made mercury emissions settling on America originated in Asia. Mercury impairs neurological development in fetuses, infants, and children, and is highly toxic.