President Barack Obama says he will seek vigorous climate-change policy. Efforts to curb greenhouse gases pose considerable economic pitfalls, as well as opportunities.

China has grown into a trading giant, but recent concerns over the safety of Chinese food and drugs have increased worries that China’s production may have outpaced the country’s policing capacity.

Non-OPEC oil producers, which turn out most of the world’s oil, are operating near capacity.

Sen. Hillary Clinton’s foreign policy team included veteran Clinton administration officials seeking to revive U.S. leadership through a balance of soft and hard power.

Through the U.S. presidential nominating process, voters have offered a muddled view on foreign policy issues but they continue to generate heat on the campaign trail.