Switzerland’s serene lakes, known for mirroring its towering mountains and embracing its cities, conceal a troubling secret beneath their tranquil surfaces. While the crystal-clear waters may appear unblemished, they harbour a potentially explosive problem: decades-old military munitions lie deep below, posing a long-term threat to the lakes’ delicate ecosystems, reported The New York Times.

In response to this hidden danger, Switzerland has launched an innovative crowdsourcing initiative, offering a total prize of 50,000…