DAVOS, Switzerland (Jan 22): Britain's Prince Charles said on Wednesday that global warming and climate change are the greatest threats humanity has faced, calling on business leaders in Davos to act now to create a sustainable economic future.

In a speech to the annual meeting of the World Economic Forum (WEF) in the Swiss ski resort, the British heir-to-the-throne said it was time for everyone in a leadership role to take action "at revolutionary levels and pace".