Precipitation (e.g. rain, snow) that has a lower pH level than normal. Acid precipitation is created when atmospheric water combines with sulfur dioxide and nitrous oxide emissions. These emissions are by-products of the combustion of fossil fuels. Acid preciptation can harm plant and animal life and alter soil conditions.
Low pH precipitation caused by sulfur and nitrogen oxides that form when pollution reacts with water in the upper atmosphere, forming hydrochloric and sulfuric acids. 894
rain and snow which has low pH (high acidity) due to pollution, usually oxides of sulfur and nitrogen; rain and snow are naturally a little acidic due to the effect of carbon dioxide on water, forming a weak carbonic acid.
Acidic rain, snow, or dry particles deposited from the air due to increased acids released by anthropogenic or natural resources. [Go to source
Rain or snow with a pH value that is less than the value for uncontaminated rain.
Precipitation, such as rain, snow or sleet, containing relatively high concentrations of acid-forming chemicals that have been released into the atmosphere and combined with water vapor; harmful to the environment.
n: Includes acid rain, acid fog, acid snow, and any other form of precipitation that is more acidic that normal (i.e., less that pH 5.6). Excess acidity is derived from certain air pollutants, namely sulfur dioxide and oxides of nitrogen. The effects can include: fish kills and eutrophication of lakes; tree kills, leading to soil erosion; and physical corrosive damage to vehicles and buildings. Many historic buildings in Europe and the NE United States are suffering damage from severe corrosion due to acid precipitation.