"Despite these massive hydroengineering efforts, China can’t feed its own people or supply enough water for its industrial economy. More than 75% of China’s surface water supply is contaminated and undrinkable. Under current United Nations standards, the amount of water available in Beijing places the megalopolis in a state of 'extreme water scarcity.' Much of China’s farmland is too polluted by heavy minerals and salinization to grow edible crops. China is now the world’s largest importer of feed grains, accounting for 60% of global imports of soybeans. It also imports 70% of its cooking oils."
