Acid rain: causes, chemistry, effects and responses Acid rain Acid rain is precipitation with elevated acidity (pH below about 5.6) produced when air pollutants form acids in the atmosphere. This article explains its formation, impacts, histo…
Air: Composition, Properties, Life Role, Uses, Pollution, and History Air Air is the gaseous envelope around Earth that supports life, shapes weather, enables technologies, and is subject to pollution and climate change. Overview of composition, properti…
Air pollution: causes, effects, history, and responses Air pollution Air pollution is contamination of the atmosphere by harmful particles and gases. This article explains common pollutants, sources, health and environmental impacts, history, and wa…
Nitrogen dioxide (NO2) — properties, sources, and impacts Nitrogen dioxide Nitrogen dioxide (NO2) is a reddish-brown, toxic gas formed by combustion. It is an oxidant in the atmosphere, contributes to smog and acid rain, and is an important industrial int…
