LOS ALAMOS, N.M. - Hydrogen fuel cells may not be the most environmentally friendly answer to America's dependence on foreign oil, according to a study led by a Los Alamos National Laboratory scientist. Los Alamos researcher Thom Rahn headed a team of scientists from California universities and the National Center for Atmospheric Research in Boulder, Colo. Their study of the natural cycle of atmospheric hydrogen was published in a recent edition of the British science journal Nature. While there are certain benefits to hydrogen power, Rahn said there may also be unforeseen consequences that need to be examined before...