UNITED NATIONS - UN Secretary General Ban Ki-moon has urged the worlds richest countries - known as the Group of 20 (G20) - to meet the demands of protesters who have lost faith in governments because of the growing global economic uncertainty. The gathering force of public protest is the popular expression of an obvious fact: that growing economic uncertainty, market volatility and mounting inequality have reached a point of crisis, he told the leaders of the G-20 group of major industrialized and developing economies in a letter released Wednesday ahead of the November 3-4 summit in Cannes, France.