Qn. The concerns of acid rain vary across the globe. What are the issues in Canada? Does the acid deposition occur outside the borders of Canada?

Ans. In Canada, acid rain has depleted calcium levels in lakes. This change in calcium concentrations has caused a shift in th ecological balance. Faced with this selection pressure, a species of plankton which requires less calcium to thrive than a competing species of plankton to gain a survival advantage and thrive. This plankton is thick and jelly like, which means that pipes used to extract water from the lake for drinking purposes get clogged more easily. Also the ecosystem may be further upset.

As for the source of said acid rain, “Between 50% and 70% of Canada’s acid rain comes from the United States, while only 2-10% of America’s pollution in this area comes from Canada.”

Sources:

http://www.citylab.com/weather/2014/11/acid-rain-has-turned-canadian-lakes-into-a-kind-of-jelly/382922/

http://www.nature.com/news/2005/050810/full/news050808-10.html