Acid Rain in Canada

a. Acid rain deposition is a problem in Eastern Canada because many of the waters and soils in this region lack natural alkalinity.

b. Yes. 50% to 70% of acid rain in Canada comes from pollution of the United States.

Reference:

1. Air (Government of Canada, Environment Canada) – https://www.ec.gc.ca/Air/default.asp?lang=En&n=AA1521C2-1
2. Acid rain still hurting Canada (Nature.com) – http://www.nature.com/news/2005/050808/full/news050808-10.html