NEET BIOLOGY

Detailed explanation-1: -In the Sudbury region of Ontario, Canada, fallout of sulfur oxides has been shown to be responsible for damage to vegetation, lakes and fishes. The acidic fallout has been shown to effect a rate of acidification in many lakes that over several decades has resulted in the extinction of many species of fishes.

Detailed explanation-2: -Many of the waters (streams, rivers, ponds, and lakes) and soils in Canada lack natural alkalinity, such as a lime base, and cannot neutralize acid naturally. Provinces that are part of the Canadian Precambrian Shield, such as Ontario, Quebec, New Brunswick, and Nova Scotia, are most affected.

Detailed explanation-3: -High levels of acid in rain can damage or kill trees and pollute lakes enough to kill fish. Houses, buildings, and statues can also be damaged. Southern Canada (near the Great Lakes region) experiences the highest levels of acid rain. 50-75% of the pollution that causes acid rain actually comes from the US.

Detailed explanation-4: -Nitric acid (HNO3) generated from emissions of nitrogen oxides (NOx) is a significant contributing factor in this region. In Canada, as in many other countries, the majority of NOx emissions are from transportation.

Detailed explanation-5: -The chemicals from the mining industry released into the air causes acid rain which in then tarnish the Great Lakes from the precipitation of the water cycle. Automobiles have also been known to emit smog and cause acid rain that will then be rained into the lakes.