Sulfur DioxideSulfur DioxideBurning coal creates

smoke, just like burning wood in a fireplace.

Coal smoke is air pollution.

How Acid Rain is FormedHow Acid Rain is Formed1. Burning coal at a

factory puts pollution in the air.

2. The pollution mixes with water in the clouds.

3. Wind carries the polluted clouds.

4. When it rains, the water is also polluted – “acid rain.”

Environmental ProblemsEnvironmental Problems

pH Scale: Acids & BasespH Scale: Acids & Bases14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Base

Acid

Drain Cleaner

Bleach

Soapy Water

Ammonia

Milk of Magnesia

Baking Soda

Sea Water

Pure Water

Healthy Lake (6.5)

Clean Rain (5.6)

Acid Rain (4.3)

Orange Juice/Vinegar

Lemon Juice

Sulfuric Acid

Battery Acid

National pH LevelsNational pH Levels1990 2010

Statue of LibertyStatue of Liberty

Acid Rain Impact on Lady LibertyAcid Rain Impact on Lady Liberty