Chapter 6 Team Question 4

The concerns of acid rain vary across the globe. Many countries in North America and Europe have websites dealing with acid rain. Either search to locate one (“Canada, acid rain”) or use these links to websites in Canada, the UK, or Europe.

What are the issues in the country you selected?

Does the acid deposition originates outside the borders of the country?

The Long-Range Transport of Airborne Pollutants

In Canada, the major sources of sulphur dioxide emissions are non-ferrous metal smelters, followed by coal-fired generators. Motor vehicles and, to a lesser extent, coal-fired generators, are the major sources of nitrogen oxides which can combine with atmospheric water to form acid rain. About half the wet sulphate deposition in eastern Canada is estimated to come from the United States, while about ten percent of the deposition in the northeastern United States comes from Canada. As half of the acid deposition in eastern Canada came from American sources, the US federal government was responsible for reducing the flow of acid pollutants into Canada

How acid rain affects the water quality in Canada

Acidic compounds in the atmosphere can occur directly, by deposition on the water surface, or indirectly, by contact with one or more components of the terrestrial ecosystem before reaching any aquatic system. In an attempt to monitor the effects of acid rain on water quality, the Canadian Wildlife Service (Ontario Region) began a monitoring program in 1980, focusing on  the chemical and biological effects of acidic precipitation on small lakes and wetlands across central and northeastern Ontario, primarily in the boreal ecozone as small, boreal lake habitats are particularly sensitive to the effects of acidic deposition (both SO4 and NOx) and the smaller water bodies are more productive and important for wildlife, especially waterfowl, which together with other wildlife represent an important socio-economic resource threatened by acidifying emissions. Effects on fish (particularly sportfish) are monitored.

References

Environment Canada www.ec.gc.ca

Leave a Reply