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Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air.
Human activities are the main cause of acid rain. Over the past few decades, humans have released so many different chemicals into the air that they have changed the mix of gases in the atmosphere.

en.wikipedia.org/wiki/Acid_rain

Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It can have  ...

www3.epa.gov/acidrain/education/site_students/whatcauses.html

Sources of Acid Rain Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air .

www.epa.gov/acidrain/what-acid-rain

Mar 1, 2017 ... Acid rain, or acid deposition, is a broad term that includes any form of precipitation with acidic components, such as sulfuric or nitric acid that fall ...

www2.gsu.edu/~mstnrhx/EnviroBio%20Projects/AcidRain/causes.html

The main chemicals in air pollution that create acid rain are sulfur dioxide ... The following are the stoichiometric equations for the formation of sulphuric acid ...

www.nationalgeographic.com/environment/global-warming/acid-rain

A virtual tree-graveyard of Norway spruce trees in Poland bears the scars of acid rain. Caused when rain droplets absorb air pollution like sulfur and nitrogen ...

www.china.org.cn/english/environment/222893.htm

Acid rain is caused by the release of the gases SO2 (sulphur dioxide) and NOX ( nitrous oxides). The main sources of NOX emissions are vehicles and fuel ...

www.conserve-energy-future.com/causes-and-effects-of-acid-rain.php

Normal rain water is slightly acidic with a pH range of 5.3-6.0, because carbon dioxide and water present in the air react together to form carbonic acid, which is  ...

www.reference.com/science/acid-rain-produced-c1b262c53293586b

Acid rain is the by-product of a chemical reaction that starts when nitrogen oxide and sulfur dioxide gases are released into the atmosphere, where they react ...

nsb.wikidot.com/c-9-3-2-10

Oct 7, 2011 ... Introduction. Rain is naturally acidic due to the dissolution of carbon dioxide forming weak carbonic acid. Acid rain refers to rain that has a ...