Review
• How can we slow world population growth?
– Improving education - literacy
•
•
•
•
health- reproductive, physical, mental, social
family planning
employment
corporate investment in literacy in developing countries
– Family Planning
• counseling
• pre and post natal care
– Investing in Social Security
– Economic Security (alleviate poverty)
• more jobs (especially for women)
• education for employment
– Education on resource management 
• greenbelt movement
• What is the current world population?
I
P  AT
S
Quiz
• 1. What resource is “absolutely fundamental
to life as we know it”.
• 2. What % of the Earth’s water is useable
freshwater?
a. 0.77% b. 2.5% c. 30% d. 70%
• 3. What is a rain shadow?
• 4. The greatest consumer of water in society
today is:
a. households; b. industry; c. agriculture
Water in the News?
• Let's visit the library news database.
Water - ecology & resource
• De 8:7 For the LORD your God is bringing you
into a good land, a land of brooks of water, of
fountains and springs, flowing forth in valleys
and hills, (>600)
• Why did God create water?
• What is the role of water in Creation?
• The anthropic principle or “the functional
integrity of Creation” principle
What role does water play for
organisms?
•
•
•
•
•
•
hydration
growth
cleaning
habitat
majority of body
cooling
Water - ecology & resource
• Most of every living organism is water.
– ≈70%
•
Osmoregulation
•
Solvent
•
Specific heat
•
Organismic balance
Water - ecology & resource
• Most of the Earth is water.
– 71% of the earth’s surface
Water - ecology & resource
• What roles does water play on Earth?
– Take 5 minutes, use your text, and make a list
of the roles
•
•
•
•
•
•
water cycle
irrigation
weather and climate
growth
energy
life sustaining
Water - ecology & resource
• What roles does water play on Earth?
Water - ecology & resource
• What roles does water play on Earth?
Water - ecology & resource
• What roles does water play on Earth?
Water - ecology & resource
• What roles does water play on Earth?
– A temperature and climate regulator
• High specific heat (1 cal/g)
• High heat of freezing (80 cal/g)
• High heat of vaporization (540 cal/g)
– A weather machine in interaction with the sun.
• Water keeps the earth livable.
What role does water play for human
society?
• Take 5 minutes, use your text, and make a
list of the roles
Water - ecology & resource
• What role does water play for humans?
– Physiological water
• 2.3 liters per day
– Functional integrity of climate systems
• 97.418 %
– Living water
• 100 gallons/person/day (8%)
– Growing our food
• 700 gallons/person/day
– Technological water - 970 gallons/person/d
Water - ecology & resource
• What role does water play for humans?
– personal water
100
U.S. Family of 4
90
Gallons water per day
80
70
60
50
40
30
20
10
0
Lawns, etc.
Toilets
Bathing
Laundry
Dishes Drinking,cooking
Water - ecology & resource
• What role does water play for humans?
– Technological water - 970 gallons/person/d
direct
indirect
20
Liters water per can of pop
18
16
14
12
10
8
6
4
2
0
metals
power
agriculture
mining
chemical
paper
other
Water - ecology & resource
• What role does water play for humans?
– 1770 gallons/person/day
Water Use in U.S.
Residential
6%
Industry
21%
Power
production
34%
Agriculture
39%
Water - ecology & resource
• What role does water play for humans?
– 1770 gallons/person/day
Water - ecology & resource
• The hydrological cycle
Principles of sustainability as related
to water
• Ecosystems use sunlight as their main source
of energy
• Ecosystems are built upon
interrelationships not independence
• Ecosystems dispose of wastes and replenish
nutrients by recycling
• Ecosystems, regulate the size of member
populations
• Ecosystems, maintain (bio)diversity
For Monday
• Continue reading Chapter 7 and we will
examine the state of our water resources
from MN to around the world