Word: carbone
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...with a child in tow, bicycle frames undergo incredible stress, especially where the hollow tubular pieces are joined. For decades, engineers struggled to strengthen frames while making them lighter. That task seemed impossible until manufacturers turned to materials used for jet fighters and missiles. Frames constructed of aluminum, titanium, carbon fiber and various metal combinations have proved to be stronger, stiffer, more shock absorbent and lighter than steel ones. The popular Kestrel frames from Cycle Composites, based in Watsonville, Calif., are made of molded carbon fiber. One-piece and aerodynamically designed, they are stronger and up to 1 kg lighter...
...shape. In the mid-'80s, solid "disk" wheels made of Kevlar improved matters but were somewhat hard to control in crosswinds. A solution came early this year from Specialized Bicycle Components of Morgan Hill, Calif.: a three-spoke wheel developed with Du Pont. Specialized's wheel, a composite of carbon fiber, epoxy resin, Kevlar and aluminum, has an air-foil shape, and was designed with a Cray supercomputer. Tests proved the wheels are faster and more durable than traditional ones...
Environmentalists staged Earth Day to dramatize a simple message: The planet is threatened by a host of man-made ills, from toxic landfills to ozone depletion. But at least one part of the message -- the theory that the buildup of carbon dioxide and other greenhouse gases in the atmosphere will cause global warming -- has come under considerable attack. A small but vocal group of scientists contends that the case for warming is sketchy and based on inadequate computer models...
That may be so. The Administration is wise to consider the possible economic damage before committing itself to a major reduction in carbon dioxide < emissions. But surely the Government can safely do much more than it has already done to spur energy conservation. It is possible to buy a great deal of insurance against global warming without sabotaging the economy...
...know the rate at which carbon dioxide is accumulating in the atmosphere; we know there is a hole in the ozone layer; we know the rainforests are disappearing; and we know what the consequences are," says Wilson, adding that the days when the environmental movement was fueled by a spiritual devotion to "wholism" are over...