Agence France-Presse: The river has dried up, the well yields only dust, and Li Yunxi is hard pressed to irrigate his plot of land, even though he lives right next to the largest water project in history. The elderly farmer watches in despair as his corn crop wilts under the scorching northern China sun, knowing that a fresh, abundant stream is only a stone’s throw away. "We ordinary people don’t dare use that water," Li told AFP as he nodded toward the fenced-in canal, part of China’s hugely …