A cooked hamburger contains more carcinogens than eight hours of secondhand smoke, a tobacco company scientist testified Friday in a lawsuit over the lung-cancer death of a nurse.

Under cross-examination, Scott Appleton acknowledged there's little evidence of a link between hamburger and lung cancer."There's no way I could say hamburger causes 160,000 lung cancer deaths each year," said Appleton, director of scientific and regulatory affairs for Brown & Williamson Tobacco Corp.

Philip Wiley is suing B&W and other major tobacco companies, alleging that secondhand smoke at a veterans hospital where his nonsmoking wife, Mildred, worked for 17 years caused her death in 1991. Wiley is seeking unspecified damages.