A global median of 54% consider climate change a very serious problem. But there are regional differences on the issues, with the U.S. and China among the least concerned.
Global climate change was the top-rated threat in a recent 40-nation survey, but concern about the issue is relatively low in the United States and Europe.
People in many countries around the world, particularly in Latin America and Africa, list climate change as a top worry. Americans, Europeans and Middle Easterners, however, most frequently cite ISIS as their top threat.
Beginning with the Arab Spring, high-profile protest movements erupted in several emerging and developing countries over the last few years. Millions have demonstrated, and activists have pioneered new forms of online engagement, but who really participates, and how?