Word: aircrafting
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...NASA has two programs that sponsor upper atmosphere research," Wesoky says. "We are funding studies to understand the effects of chlorofluoro carbons [CFCs] on the Antarctic ozone layer as well as studies to understand the impact of a fleet of supersonic aircraft on ozone depletion...
...NASA is funding a 150-million-dollar, 12-year study to understand the atmospheric effects of subsonic and supersonic aircraft," Wesoky adds. "Anderson's group is looking at only one element of six areas, but it is the most expensive and complex...
Supersonic aircraft, which currently include the Concorde and some military planes, produce these nitrogen radicals in their engines. "Estimates show that a 50 percent increase in nitrogen radicals [in the lower ozone layer] is expected from a fleet of supersonic aircraft," Wennberg says...
Supersonic Aircraft...
...This HSCT would go twice as far [as the current Concorde can] with three times as many people at one-10th the ticket price and not damage the ozone layer," Goldin said. "And with its speed, it could do twice the work of a subsonic aircraft...