China's capital of Beijing is literally sinking into the ground, a recent study found. "An international study led by Beijing-based researchers has discovered that the city is dropping by as much as 11 centimeters (4 inches) in some districts per year," CNN reported Sunday. The sinking is happening because of the city's depleted groundwater, with central districts the most severely affected. The city regulates the instillation of wells but inconsistently applies it, the Guardian reported. China requires around 3.5 billion liters of water each year. Water management has been a struggle for the world's most populous country, with droughts causing billions of dollars in damage and leaving many citizens and animals without drinking water in southern China a few years ago. "We are currently carrying out a detailed analysis of the impacts of subsidence on critical infrastructure (eg high-speed railways) in the Beijing plain," three of the seven academics involved in the study told the