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Lake 223 acid rain experiment: Scientists added sulfuric acid to an Ontario lake for 17 years. The water recovered, but the fish didn’t

For 17 years, scientists deliberately made a remote Canadian lake more acidic to understand what acid rain was doing to freshwater ecosystems. The experiment ended more than three decades ago, and ...
Indiatimes

Scientists added sulfuric acid weekly to an Ontario lake for 17 years, lowering pH from 6.8 to 5.2; decades later its lake trout population remains below half its former level

A lake in northwestern Ontario became the setting for a landmark experiment on the effects of acid rain. For 17 years, scientists deliberately added sulfuric acid to Lake 223 every week, gradually ...