U.S. Secretary of State John Kerry is in Indonesia, where he plans to make a major speech Sunday on climate change and its possible impact on Asia.
The State Department says Kerry plans to talk about what it calls the compelling and undeniable scientific case that the Earth is getting warmer and heading to the point of no return.
He will stress that this is a global problem that needs a global solution.
A warmer planet means a rise in sea levels which could have a dangerous impact on island nations like Indonesia.
Kerry arrived in Indonesia Saturday from China, where he talked about global warming and other matters with President Xi Jinping.
The two issued a joint statement recognizing the need for what they call urgent action to fight climate change and to work together to cut greenhouse gas emissions.
Many scientists believe burning fossil fuels in cars and factories is a major cause of global warming. The United States and China are the world's two biggest polluters.
Indonesia is the last stop on Kerry's six-day Asian tour, which, along with China, included a stop in Seoul.