Avoiding global climate chaos will require a major transformation of society and the world economy that is "unprecedented in scale," the UN said Monday in a landmark report that warns time is running out to avert disaster.

COX'S BAZAR, Bangladesh - The situation in Myanmar is a "textbook example of ethnic cleansing", the United Nations rights chief said on Monday, as the number of Rohingya Muslims fleeing the country for Bangladesh topped 300,000.