The Three Gorges Dam on the Yangtze River is the world’s largest and most controversial hydropower project. The 600 kilometer-long reservoir has displaced 1.3 million people and is wreaking havoc with the environment. The reservoir reached its final height in 2010, but many of its impacts...

Water resources in the world are scarce and unevenly distributed. In deserts, the only source of drinking water is groundwater, often saline and of poor quality. In many places, the groundwater levels have dropped dangerously due to overexploitation. Gypsum deposits, that are very common in...