U.S. Secretary of State John Kerry is in Indonesia, the last stop on his Asian tour.
Secretary Kerry arrived in the Indonesian capital Saturday after a visit to China.
On Sunday, he will make a major speech in Jakarta on climate change. A senior State Department official says Kerry will call on the global community -- both countries and individuals -- to do more now to address the threat.
The top U.S. diplomat flew to Jakarta from Beijing where he talked with President Xi Jinping about global warming, human rights, and what the United States sees as China's efforts to assert itself in Asia by setting up an air defense zone over the East China Sea. The zone includes islands also claimed by Japan.
Kerry said he urged Beijing to take a less confrontational approach to territorial disputes. Chinese Foreign Minister Wang Yi said China prefers a peaceful resolution, but will not hesitate to protect its sovereignty.
After meeting with Mr. Xi, Kerry said he was pleased with Beijing's commitment to pressure North Korea to return to nuclear talks. He said China could not have more forcefully reiterated its commitment to a nuclear-free Korean peninsula.
Chinese Foreign Minister Wang said Beijing would never allow chaos or war in Korea, and is serious in both words and actions.
China is North Korea's only major ally and a key source of trade and economic aid.