By Ben Tavener, Senior Contributing Reporter
RIO DE JANEIRO, BRAZIL – The leaders of both France and Russia have confirmed they will be among the 100+ world leaders and 50,000 participants - from leaders of various social organizations to business figures - touted to be coming to attend the "Rio+20", the UN’s high-profile conference on sustainable development, which is to be held in Rio de Janeiro in late June this year.
France’s President-elect François Hollande and . . .