/file/attachments/2998/14314005_213973.jpg?#)
In 2003, Germany began flooding a former coal pit; by 2011, it had become a 1,840-hectare lake home to 240 bird species
In 2003, Germany began flooding a coal pit. By 2011, it held 423 billion liters. Today, the clear lake hosts 240 bird species but faces growing pressure. | World News
