Dongting Lake has been reported as a lake in crisis. Dropping water levels have sent alarm-bells ringing in scientific and environmental circles, as the area of the lake has reportedly dropped by nearly 50 percent in the past 70 years. 150 years ago, it was 6,250 square kilometers. 60 years ago, it was 4,350 square kilometers. Now, it's 2,600 square kilometers. Hunan Province, China.