When did acid rain occur specific datesyears?

Answer 1

The problem was first reported in Germany in the 1960's when trees in the Balck Forest were impacted. This would be the year of reporting it. Prior to that cities like London has acidic fogs in the 1800's which would have been "acid precipitation" if it were to be labeled. Similarly the release of SOx from Inco's smelter in Sudbury, Ontario in the the mid-1900s would have produced a similar effect - but again no one was looking of it.

Answer 2

Acid rain is not an episodic event. That means it does not come into an area like a snowstorm, deposit low pH water and leave.

Acid rain is a chronic condition created by ongoing emissions of SOx and NOx by sites burning fossil fuels or refining sulfidic ores.

It was first observed to be impacting forests in Germany in the early 1960's. Prior to this sites like Canada's Inco nickle plant may have been causing acid precipitation for years but nobody knew what to look for.

Answer 3

Acid rain became a recognized environmental issue in the late 1960s and 1970s. Its peak occurred in the 1980s and early 1990s before measures were taken to reduce sulfur dioxide and nitrogen oxide emissions that contribute to its formation.