1. Freshwater Resources 2.1 Fresh water is an essential resource. 2.2
CHAPTER
NEW CHAPTER
Freshwater Resources
the BIG idea
Fresh water is a limited resource and is essential for human society.
2.1
Fresh water is an essential resource.
2.2
Society depends on clean and safe water.
2.3
Water shortages threaten society.
CHAPTER OUTLINE

2. Fresh water is an essential resource.
2.1
Fresh water is an essential resource.
Fresh water is essential for life and is used for many human activities.
irrigation
aquaculture
farming
dam
lock
industry
transportation and recreation
fisheries and aquaculture
energy
living organisms
SECTION
OUTLINE

3. Society depends on clean and safe water.
2.2
Society depends on clean and safe water.
Water is treated for safe drinking.
concentration
sewage system
septic system
Water is drawn from a river or lake.
Water is treated.
Water is stored and distributed.
point-source pollution
nonpoint-source pollution
SECTION
OUTLINE

4. Society depends on clean and safe water.
2.2
Society depends on clean and safe water.
Water is treated for safe drinking.
Pollution can harm the water supply.
concentration
sewage system
septic system
point-source pollution
nonpoint-source pollution
SECTION
OUTLINE

5. Water shortages threaten society.
2.3
Water shortages threaten society.
Drought and overuse can cause water shortages.
drought
desalination
Lake Chad has shrunk over the past 30 years.
SECTION
OUTLINE

6. Water shortages threaten society.
2.3
Water shortages threaten society.
Drought and overuse can cause water shortages.
drought
Americans use an average of 168 liters per person each day.
desalination
shower 21%
tap 12%
bath 9%
dish washing 3%
toilet leaks 5%
toilet flushes 29%
washing machine 21%
SOURCE: U.S. Environmental Protection Agency
SECTION
OUTLINE

7. 2.1 Fresh water is an essential resource.
I. Fresh water is an essential resource.
irrigation
A. Fresh water supports life.
aquaculture
B. Most human activities require water.
dam
1. Farming
lock
2. Industry
3. Transportation and Recreation
4. Fisheries and Aquaculture
5. Energy
C. Dams and other structures alter rivers.
KEY CONCEPT
SUMMARY

8. Society depends on clean and safe water.
2.2
Society depends on clean and safe water.
II. Society depends on clean and safe water.
concentration
A. Treatment makes water safe for drinking.
sewage system
1. Quality Standards
septic system
2. Treatment of Drinking Water
point-source pollution
B. Wastewater is treated and released.
1. Sewage System
nonpoint-source pollution
2. Septic System
C. Water pollution comes from many sources.
D. Water pollution can be prevented.
KEY CONCEPT
SUMMARY

9. Water shortages threaten society.
2.3
Water shortages threaten society.
III. Water shortages threaten society.
drought
A. Water shortages are a global problem.
desalination
B. Overuse can cause water shortages.
C. Fresh water can be conserved.
1. The Need for Conservation
2. Conservation Practices
D. People can balance water needs and uses.
1. Shortages
2. Pollution
3. New Sources
KEY CONCEPT
SUMMARY