Word: fuel
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...brainer, but it’s only a small step toward curbing global warming. Lighting only comprises 9 percent of U.S. residential energy usage, and residential usage makes up only about one-fifth of all energy usage in the U.S. It will take more reductions in fossil fuel-supplied energy usage before our carbon dioxide emissions will see any real change. It will require culture-changing sacrifices of the magnitude that the Chronicle predicts...
...under swaying palm trees on the beach of a private island owned by Richard Branson in the British Virgin Islands. It is the week after Thanksgiving, and Branson is playing host to a "galactic get-together" on Necker Island. Beer and wine are being consumed like so much rocket fuel. Sushi floats in on a boat--to the middle of the pool. (Swimsuits required!) There's a casino party one night, a tennis tourney in the pouring rain and golf off the top deck of Branson's Balinese-inspired house on the hill--which you can do when...
...oddest-looking suborbital ride, however, is by John Carmack, who is building podlike contraptions that sometimes land on all fours. Sometimes not. The Pixel, made for one, is a platform atop four tanks of fuel (liquid oxygen and ethanol). He's not strapping anyone in yet, right? "Funny you should say that," he says, picking up a motorcycle saddle at his Armadillo Aerospace shop one evening. "It goes on top of the electronic box over here. We did a parking-lot flight a couple of years ago and roughed up one of our earlier vehicles." Not to worry, he says...
Luckily, space is a gold mine. A geologist by training, Benson points out that all those comets and asteroids tumbling around in near-Earth orbit contain water and minerals. Water's components--hydrogen and oxygen--are the building blocks of life and a darn good rocket fuel as well. Some estimates put the number of asteroidal water deposits at 5 million. Some metallic asteroids have 100 times the concentration of gold of any mines on earth today. (Earth's gold results from some of those asteroids crashing into the planet.) "While exploration is going on, we can use those natural...
...model seems like a logical one, though. A single-class cabin streamlines onboard service and crew training, and using smaller jets, like 757s, instead of 777s, lowers fuel and maintenance costs. So the new entrants can offer competitive premium service at a reduced price...