There they chemically combine into dilute sulfuric and nitric acids, which fall back to the earth. This is acid deposition. In concentrations sometimes more acidic than lemon juice, the pollutants reach the earth in rain, snow, hail, sleet, or fog. Dry acidic particles also fall from the atmosphere. Because wind can carry gases and moisture for hundreds of miles, even areas far away from the source bear the effects of acid deposition.
Many scientists believe that acid deposition contributes to deforestation and soil degradation.
It is known to dramatically accelerate the deterioration of buildings, including landmarks such as the Acropolis in Athens, the Taj Mahal in India, and the Statue of Liberty in New York City. Though much of the world is affected by acid deposition, its worst consequences are found in parts of Eastern Europe. Acid deposition may threaten human health, and it has taken a toll on wildlife. Some of the most noticeable effects are on aquatic life including fish, amphibians, and microscopic organisms that play an important role in water ecosystems. Many lakes, streams, and rivers have suffered profound loss of life.