In 1984, Wisconsin scientists divided a lake in half and acidified one side to mimic acid rain; bass stopped reproducing, and the fishery collapsed

In northern Wisconsin, scientists divided a lake in two and acidified one half to study the long-term effects of pollution on freshwater ecosystems. The experiment at Little Rock Lake began in 1984 and was followed by decades of monitoring and recovery studies.

Raccontata datimesofindia.indiatimes.com