YOKOHAMA, Japan (AP) — Challenges such as extreme weather, rising seas and worsening scarcity of drinking water are forcing many Asian governments to confront the changes being wrought by a warming planet even as some point to rich Western nations as major culprits.

Millions of people in the region have already been displaced by floods and droughts thought related to global warming, a United Nations scientific panel said in a report meant to guide policymakers and form the foundation for a new climate treaty due next year.