In the last decade, sales of filter cigarettes have leaped from less than 1% to more than half of all U.S. cigarettes sold. Filters rescued the industry from a skid six years ago when the first cancer-cigarette studies were widely publicized, helped sell a record 456 billion cigarettes last year. They also touched off a heated controversy on their advertising claims of reduced tar and nicotine. Last week FTC Chairman Earl W. Kintner announced that all cigarette makers had agreed to end the tar derby by dropping claims to filter effectiveness, taking...
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