By Michael Hogan HAMBURG (Reuters) - Greater global efforts should be taken to safeguard precious world water supplies to secure food production, the agriculture ministers of the group of 20 leading economies (G20) said on Sunday. "We commit to approaches that improve sustainability of water use in food and agricultural production while ensuring food security and nutrition in accordance with our multilateral trade commitments," they said in a statement after meeting in Berlin. Climate change, the growing world population and demands for industrialization have put a strain on global water supplies, with the impact felt on rich and poor nations.
