Awwal 05, 1432, Feb 08, 2011, SPA -- U.S. Treasury Secretary Timothy Geithner said Monday it was "not clear" to him what France was proposing within the Group of Twenty (G20) to eliminate food price volatility, and he implied that market forces should be allowed to work without interference. Geithner's remarks, in response to a question asked at a meeting with business students and professors in Sao Paulo during a visit to Brazil, came as U.N. food agencies and France warned of unrest over rising food prices globally. France, the current chair of the G20 major developed and developing countries, has pledged to bring stability to food prices, possibly by creating new mechanism in the World Trade Organization (WTO). G20 agriculture ministers have been invited to Paris in June to draft solutions. But Geithner said the United States, while "working closely" with France on the issue, was wary of anything that might jeopardize the recovery from the global financial crisis.