Word: clouded
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Dates: during 1970-1979
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...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...
their heads in cloud, their feet...
...University and union will ultimately agree on a third party to help mediate their differences. The two sides, while far apart on many issues, still appear willing to negotiate the morale problem, and the union has thus far avoided raising the threat of a work action that could only cloud the dispute even further. Yet the University's apparent reluctance to reach a quick agreement with the union on the preliminary question of a third party to the negotiations creates some doubt as to its willingness to face the important non-salary issues that concern union members. Its failure...
...elementary particles. One of the principal achievements of physics in the 20th century has been the revelation that the atom is not indivisible or elementary at all but has a complex structure. In 1911 Ernest Rutherford showed that the atom consists of a small, dense nucleus surrounded by a cloud of electrons. It was subsequently revealed that the nucleus itself can be broken down into discrete particles, the protons and neutrons, and since then a great many related particles have been identified. During the past decade it has become apparent that those particles too are complex rather than elementary. They...
...there's the story, of a lot of hard work without a coach holding a stopwatch or leaving a cloud of chalkdust...