Lecture 4

February 3, 2005

1. Hand back and discuss quiz 1

comments

"assessment matrix"

question 1 of assessment same as question 1 on quiz. Define carrying capacity.

 

	correct on quiz	wrong on quiz
correct on assessment	17	9
wrong on assessment	1	2

 

question 2 of assessment was the same as question 6 on the quiz. 4 stages of demographic transition

	correct on quiz	wrong on quiz
correct on assessment	9	2
wrong on assessment	7	10

 

2. Schedule for today

assessment

sustainable water use

classification of energy and mineral resources

depletion of non-renewable sources

media

break

energy alternatives: pros and cons for each

energy efficiency, "net" energy

negawatt

examples of energy efficiency

• cars
• homes

renewable forms of energy

• solar
• wind
• biomass

decentralization, the "soft path" and solar-H2

 

3. Assessment

4. How do we move toward more sustainable use of water

compare Tuscon to Las Vegas

water rights

• commons
• tragedy of the commons - dilemma
• set up institutions (Elinor Ostrom)
• for example - pumping from the aquifer in three cities

mix of strategies

• irrigation
• water saving technologies
• stream and watershed management

5. Classification of natural resources - mineral reserves

6. Depletion of non-renewable resources

7. Media

8. Energy alternatives - a quick tour

how to distinguish the values of different resources

why I don't like nuclear - personal statement

figure from Ripl

dissipation zones

 

9. Importance of efficiency

efficiency of each step

net energy

negawatt - a watt saved is t he same as a new watt produced

examples of efficiency

homes

cars

10. renewable forms of energy

efficiency of operation

life cycle analysis

passive solar

solar panels

wind

biomass

coppice-farm

 

11. renewable forms of energy and change in social and economic institutions

distributed power

example: solar/hydrogen economy