A number of business leaders are joining the fight against sprawl, worried that traffic jams, air pollution, and a lack of open space will drive away the best workers. A study released today by the National Association of Local Government Environmental Professionals highlights 19 “smart growth” initiatives undertaken by businesses. For example, DaimlerChrysler is building a $1.6 billion plant near downtown Detroit rather than in the far-flung suburbs; two Florida developers are trying to direct growth away from the sensitive Everglades; and 45 businesses in York County, Pa., are investing in old urban areas.