Our Water Resources ENS102 3/10/2006

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?

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.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” principleanthropic

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 % –Living water 100 gallons/person/day (8%) –Growing our food 700 gallons/person/day –Technological water gallons/person/d

Water - ecology & resource What role does water play for humans? –personal water

Water - ecology & resource What role does water play for humans? –Technological water gallons/person/d

Water - ecology & resource What role does water play for humans? –1770 gallons/person/day

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