The document discusses acid rain and its causes and effects. It explains that burning coal releases pollution into the air which mixes with water in clouds. When the polluted clouds rain, the rain is acidic. Acid rain harms the environment and has damaged structures like the Statue of Liberty over time by eroding the copper. The pH scale is shown to illustrate normal rain is around 5.6 while acid rain is around 4.3, and national pH levels have improved slightly from 1990 to 2010.

2. Sulfur Dioxide
Burning coal creates
smoke, just like burning
wood in a fireplace.
Coal smoke is air
pollution.

3. How Acid Rain is Formed
1. 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.”

4. Environmental Problems

5. pH Scale: Acids & Bases
Base
14
Drain Cleaner
13
Bleach
12
Soapy Water
11
Ammonia
10
Milk of Magnesia
9
Baking Soda
8
Sea Water
7
Pure Water
6
Healthy Lake (6.5)
5
Clean Rain (5.6)
4
Acid Rain (4.3)
3
Orange Juice/Vinegar
2
Lemon Juice
1
Sulfuric Acid
0
Battery Acid
Acid

6. National pH Levels
1990
2010

7. Statue of Liberty

8. Acid Rain Impact on Lady Liberty