In the U.S. and around the globe, the spread of nuclear weapons is seen as a major threat, but not overwhelmingly so. Those concerned, however, look to the U.S. for leadership.
As leaders convene in Copenhagen to discuss climate change, they will address a concern shared around the globe. Publics are willing to sacrifice economic growth for the environment, but nations are split on which country should lead on global warming.
Pew Research Center president Andrew Kohut, New York Times columnist David Brooks and Foreign Policy editor Moises Naim discuss findings and implications of the new survey.