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...Greater concern for the environment and climate has created a need for greener transportation that has so far gone unfilled. High-speed rail fits the bill; according to Popular Mechanics, high-speed trains emit, on average, 40 percent less carbon per passenger-mile compared to cars and 55 percent less carbon compared to jets. The popularity of trains in Japan and Europe has taken millions of cars off the roads. The result is less congestion and less air pollution...
...fledgling U.S. nuclear industry, which was already canceling new reactors all over the country before TMI, and has not ordered one since. That's a shame, because nuclear reactors produce no carbon emissions. If we got 80% of our electricity from nukes today, as France does, we'd emit nearly a third less carbon. It would be the greenhouse-gas equivalent of taking all our cars off the road. So it would be nice if we could turn back the clock...
...Obama Administration's "cap and trade" initiative, which is designed to curb both the use of energy and greenhouse-gas emissions across the entire economy. For carmakers, such legislation would be mostly neutral because they earn credit for making electric vehicles and could spend it on cars that emit too much CO2. GM now notes that one-third of the Cadillac Escalades it sell are hybrids, so it would have plenty of currency. Of course, at this point Detroit is hoping for anything that doesn't have California's fingerprints all over...
...written, using the Clean Air Act to regulate greenhouse-gas emissions directly would be unreasonably difficult, because of carbon dioxide's sheer ubiquity. In 2000, the U.S. emitted less than 18 million tons of the pollutant sulfur dioxide, chiefly from cars, power plants and factories. In the same year, national CO2 emissions reached nearly 6 billion tons, from virtually every aspect of modern life. Regulating emissions would be like trying to gather up the ocean. In addition, the Clean Air Act technically requires "major" sources of pollutants - meaning those that emit more than 250 tons a year - to acquire costly...
Using a pair of ions, or charged particles, group leader Christopher Monroe and his team place each in a vacuum and keep them in position with electric fields. An ultra-fast laser pulse triggers the atoms to emit photons simultaneously. If the photons interact in just the right way, their parent atoms enter a quantum state known as entanglement, in which atom B adopts the properties of atom A even though they're in separate chambers a meter apart. When A is measured, the information that had been previously encoded on it disappears in accordance with the quirky rules...