are a crucial part of Québec’s natural heritage. They are significantly
affected by our presence and the pressure we exert on them. It is important
to observe the changes taking place in our lakes, and to understand what
they mean so we can protect them better.
Starting in the late 1970s, scientific
studies showed that the southwest part of the province was receiving very acid
precipitation. Programs put in place by a range of stakeholders have acted at
the source, reducing SO2 emissions by 50%
to 70%. The quality of numerous acid lakes has improved, yet the problem
persists in a large number of particularly sensitive lakes.