Acid deposition, commonly known as acid rain, refers to the process by which acidic components (sulfuric or nitric acid) fall from the atmosphere to the Earth's surface. This can occur through wet deposition (rain, snow, fog) or dry deposition (gases and particles), significantly impacting soil and water chemistry.

Acid deposition, often resulting from sulfur and nitrogen emissions, significantly lowers the pH levels of freshwater bodies. In Norway, this acidification has historically caused severe stress and mortality in salmon populations by disrupting their reproductive cycles and physiological health, making them unable to survive in acidified river environments.

Acid deposition, commonly known as acid rain, contains sulfuric and nitric acids. These acidic compounds react with the chemical binders and pigments in exterior house paints, leading to discoloration, peeling, and premature deterioration of the protective coating.

Wet deposition refers to the removal of atmospheric pollutants, such as sulfur and nitrogen oxides, from the air via precipitation. When these pollutants dissolve in water droplets in the atmosphere, they form acids that fall to the ground as rain, snow, or fog, contributing to environmental acidification.

When sulfur dioxide and nitrogen oxides are emitted into the atmosphere, they react with water, oxygen, and other chemicals to form sulfuric and nitric acids. These acids fall to the ground in the form of rain, snow, or fog, a process collectively known as wet deposition. This is a primary component of acid rain.

Sulfur dioxide (SO2) is a major air pollutant that reacts with atmospheric moisture to form sulfuric acid. This acid deposition can cause significant damage to various materials, including leather, by breaking down the collagen fibers, leading to brittleness, discoloration, and eventual disintegration of the material over time.

Acid deposition, commonly known as acid rain, introduces sulfuric and nitric acids into ecosystems. This alters the pH of soil and water, which can lead to the leaching of nutrients, the mobilization of toxic metals like aluminum, and the death of sensitive aquatic and terrestrial organisms. Consequently, these disruptions significantly threaten the overall ecological balance of affected regions.

Acid deposition, commonly known as acid rain, alters the chemical composition of soil and water. It can leach essential nutrients like calcium and magnesium from the soil while mobilizing toxic metals like aluminum, which inhibits the germination and growth of sensitive tree species such as spruce.