WASHINGTON (AP) — President-elect Barack Obama has named Harvard physicist John Holdren and marine biologist Jane Lubchenco to top science posts. Obama made the announcement Saturday in his weekend radio address. Holdren will become Obama’s top science adviser as director of the White House Office of Science and Technology Policy; Lubchenco will lead the National Oceanic and Atmospheric Administration. Both advocate a forceful government response to global warming. Holdren also will direct the president’s Council of Advisers on Science and Technology. Joining him as co-chairs will be Nobel Prize-winning scientist Harold Varmus and Massachusetts Institute of Technology professor Eric Lander, a specialist in human genome research.