Word: filteration
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...beagles' size and shorter life span. Two of the dogs' cancers were indistinguishable from human smokers' lung cancer; the remaining ten were of types that are less common but are also found in men. There were other significant results: dogs that smoked the same number of filtered cigarettes did not develop cancer. Nor did those that smoked an average of 31 non-filter cigarettes daily...
Cancer Society spokesmen cautioned that the filter cigarette cannot "objectively be called a 'safe' cigarette" simply because the dogs kept on filter cigarettes did not develop cancer. But they conceded that with the filters, damage to lung tissue advances less rapidly. While animal experiments can never offer conclusive proof about disease in man, Auerbach has previously shown that human lungs undergo similar, progressive changes in proportion to the amount smoked. This, coupled with his beagle findings, makes an undeniably strong case...
...cast began to filter out the door, Keith I am Carradine, the sensitive, unassuming hero of the show, removed his Indian headband, put on a more comfortable stovepipe hat, and took me over to the Haymarket, a nearby bar. I was there introduced to George Hirsch, Jessica Harper, and Jonathan Kramer...
Gradually, the Hair people filter up onstage, and the show is beginning. Dionne and company begin singing Aquarius, and the tribe flies energetically into life. Never losing momentum, they transform the marvelously entertaining evening's mood intermittently into moments of intense realism that clevate the play from delightful musical into very serious social commentary...
Some environment experts visualize future dramas of disaster that seem to border on science fiction. A few scientists feel that the outpouring of carbon dioxide, mainly from industry, is forming an invisible global filter in the atmosphere. This filter may act like a greenhouse: transparent to sunlight but opaque to heat radiation bouncing off the earth. In theory, the planet will warm up. The icecaps will melt; the oceans will rise by 60 ft., drowning the world's coastal cities...