Web Results

en.wikipedia.org/wiki/Acid_rain

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

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 ...

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

Acid rain is rain that has been made acidic by certain pollutants in the air. Acid rain is a type of acid deposition, which can appear in many forms. Wet deposition  ...

www.epa.gov/acidrain

What EPA Is Doing. The EPA flag flying in front of the Ariel Rios Building in Washington, D.C.. Acid Rain Program · Cross-State Air Pollution Rule · Progress  ...

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 ...

projects.ncsu.edu/project/bio183de/Black/chemreview/chemreview_reading/acid_rain.html

Acid rain can be carried great distances in the atmosphere, not just between countries but also from continent to continent. The acid can also take the form of ...

www.dictionary.com/browse/acid-rain

Acid rain definition, precipitation, as rain, snow, or sleet, containing relatively high concentrations of acid-forming chemicals, as the pollutants from coal smoke, ...

nadp.sws.uiuc.edu/educ/acidrain.aspx

Acid rain” became a household term in the 1980s when unchecked emissions from industry and motor vehicles were blamed for causing environmental ...

pubs.usgs.gov/gip/acidrain/2.html

Jul 21, 1997 ... Liquids with a pH less than 7 are acid, and those with a pH greater than 7 are alkaline (or basic). "Clean" or unpolluted rain has a slightly acidic ...