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MET 12 Global Warming: Lecture 13

Energy

Shaun TannerSan Jose State University

Outline:Outline: Energy use Story of Stuff

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Obviously, one of the main issues related to climate change is the burning of fossil fuels

Thus, energy use, and the continuing demand for energy are central to the challenges of climate change.

Energy and Climate Change

Greenhouse Gas Emissions

CO2 emissions per person

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US COUS CO22 Emissions Emissions

Total emissions ~ Total emissions ~ 5,788.5 million metric tons5,788.5 million metric tons ~ 22 metric tons per person ~ 22 metric tons per person

Industry: 35% Industry: 35% Transportation: 33%Transportation: 33% Residences: 18%Residences: 18% Commercial: 14%Commercial: 14%

1,600 million metric tons due to personal use (~33%)1,600 million metric tons due to personal use (~33%)

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Automobile fuel: 38 gallons per month Natural Gas: 15 therms per monthElectricity: 190 Kilowatt-hours per monthAirline Miles flown  147 miles per monthTotal:

Latest estimate ~ 17,600 lbs of CO2 Kyoto allowance (for US):

~11,000 pounds To stabilize climate (550ppm)

4,700 pounds

Average US Personal Energy Use (Per Person)

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1. What percentage of electricity generation comes from the burning of natural gas?

2. What percentage of transportation energy comes from natural gas burning?

3. What percentage of transportation energy use comes from coal?

4. If you buy an electric car, what is the mostly likely source of energy?

5. Where does most residential energy come from?

Questions

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What percentage of electricity generation comes from the burning of natural gas?1. 5%

2. 10%

3. 17%

4. 61%

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If you buy an electric car, what is the most likely energy source

1. Natural gas

2. Coal

3. Petroleum

Solutions require reductions in energy use…

Energy is used to make many things…

Apple

Photo credit: Terry Photo credit: Terry NathanNathan

Apple Ipod

1 Energy Unit

How many energy units to make an iPod?

1. Between 0-5

2. Between 5-20

3. Between 20-50

4. Between 50-500

5. Between 500-5000

6. Between 5000-10000

Apple

1 Energy Unit100-250 Energy

UnitsPhoto credit: Terry Photo credit: Terry

NathanNathan

Apple Ipod

MacBook Air -2001113-inch MacBook Pro 17-inch MacBook Pro 15-inch MackBook Pro MacBook-2008iMac (24 inch)-2011 iMac (20 inch)-2011 LED Cinema DisplayMac Pro Mac Min iPhone 3GS iPhone 4S iPod nano iPod touch iPod shuffle

Carbon Footprint of Apple products

Direct and Indirect Energy

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Mitigation of climate changeMitigation of climate change

Mitigation: Mitigation: – Steps taken to avoid or minimize negative Steps taken to avoid or minimize negative

environmental impacts. environmental impacts. Mitigation can include: Mitigation can include:

– avoiding the impact by not taking a certain avoiding the impact by not taking a certain action; action;

– minimizing impacts by limiting the degree or minimizing impacts by limiting the degree or magnitude of the action; magnitude of the action;

– rectifying the impact by repairing or restoring rectifying the impact by repairing or restoring the affected environmentthe affected environment

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Story of StuffStory of Stuff

1.1. ExtractionExtraction

2.2. ProductionProduction

3.3. DistributionDistribution

4.4. ConsumptionConsumption

5.5. DisposalDisposal

Planned and perceived obsolescencePlanned and perceived obsolescence Connections with climate changeConnections with climate change

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Story of Stuff Assignment (Due Story of Stuff Assignment (Due Nov 1Nov 1stst))

Write a paragraph describing connections Write a paragraph describing connections between the story of stuff and global warming between the story of stuff and global warming Also in your paragraph, include the pros and Also in your paragraph, include the pros and cons of recycling.cons of recycling.