Word: emitted
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...certain products, including hair sprays. Fluorocarbons, for all their drawbacks, are not combustible; neither is the butane-water mix in the Aquasol system. Anticipating the federal fluorocarbon ban, Gillette and some other manufacturers last year began switching to pump-action containers for their products, but these do not emit the fine, even spray of Abplanalp's aerosol nozzles. If Aquasol passes market tests and proves as popular as aerosol, the nation's medicine cabinets could remain stocked with spray cans a long time into the future...
...exceed five million dollars. The telescope housing alone cost over $1.3 million. Herbert Gursky, the Center's associate director for optical and infrared astronomy, says researchers will use the new telescope to make a systematic survey of quasars--the most distant, fastest-moving objects in the universe. Quasars also emit radiation at vastly higher levels than any other objects, because of their distance from earth. Only a large telescope can detect them. Quasars may provide astronomers with a window on the early history of the universe because their light takes billions of years to reach the earth. Gursky says...
Because black holes emit no radiation, they can never be directly observed. Their existence may be deduced only from the extraordinary effects black holes have on nearby objects, outside the event horizon. Lightman is attempting to predict the influence of black holes upon the distribution of stars, anticipating the day when such stellar patterns can be observed...
...number of doomsday arguments have been raised against the Concorde, as well as against the ill-fated Boeing SST that was scrapped in 1971. There were prophecies that supersonic aircraft would emit such great quantities of water vapor that a permanent cloud barrier would shut out the sun; this "greenhouse" effect would dangerously raise the earth's surface temperature. There were also predictions of skin cancer epidemics: nitrogen oxides released by the SSTs would destroy the ozone layer that partly shields the earth against the sun's lethal ultraviolet radiation. Then too, the SST's fumes were...
...these dangers have turned out to be exaggerated. Most scientists now believe that it would take a fleet of at least 100 SSTs to produce even a minimal greenhousing effect; no more than 16 Concordes are likely to be manufactured. Future generations of SSTs will probably be designed to emit much less water vapor. As for pollution, the plane's emissions fall within generally accepted levels. The available evidence does not substantiate the fears of ozone destruction. Compared with the thousands of U.S., Soviet and West European supersonic warplanes that crisscross the skies, the tiny Concorde fleet could...