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acid rain

What Is Acid Rain?
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What Is Acid Rain?

Dangerous chemicals fall from the atmosphere as rain, fog, mist, snow, dust, and smoke, harming plants and animals on the ground and in the water. Most acid rain comes from burning fossil fuels and other human activities.

Find out how the acid forms in the first place — and why some of it comes from natural sources.

Environmental Protection Agency
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‘Rivers on Rolaids’: How Acid Rain Is Changing Waterways

‘Rivers on Rolaids’: How Acid Rain Is Changing Waterways

The chemistry of river water in many parts of the U.S. has become more alkaline. Find out how acid rain created this curious phenomenon. More...

Article
NPR
Scientists Hunt for Acid Rain and Methane in Wetlands

Scientists Hunt for Acid Rain and Methane in Wetlands

Wetlands produce methane naturally. So, researchers went to these swampy areas to study how acid rain affects methane gas. Could acid rain actually block production of methane, a harmful greenhouse gas? More...

Images
Environmental Protection Agency
Explore the Acid Lake

Explore the Acid Lake

Take a look at a lake that acid rain killed. But first follow the steps and the pH scale that illustrate how the water went from health to death. More...

Interactive
EcoKids
Make Acid Rain

Make Acid Rain

Don’t try this at home! Ask your science teacher to help you create your own version of acid rain to find out some of its harmful effects. More...

Activity
Discovery
Olive Oil Coating Could Save York Minster

Olive Oil Coating Could Save York Minster

Acid rain and air pollution have caused damage to limestone structures from the Middle Ages. A water repellent derived from olive oil may provide some protection. More...

Article
Chemistry World
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pH Scale: Acid Rain

pH Scale: Acid Rain

How acidic is acid rain? Compare it to battery acid, lemon juice, ammonia, bleach, and other substances on the pH scale, including clean rain and pure water. More...

Article
Environmental Protection Agency
Sour Showers: Acid Rain Returns

Sour Showers: Acid Rain Returns

Different acid, same problem: Once sulfuric acid created most of the world's acid rain, but now it’s nitric acid. See the sources of this acidic scourge. More...

Article
Scientific American

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