BAESI – Global Warming

1. BAESI – Global Warming Carbon Footprint Dr. Eugene Cordero Department of Meteorology and Climate Science

3. Energy and Climate Change • 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.

4. CA CO2 Emissions (per person) • 22,941 lbs CO2 per person • Annual usage: • Electricity Usage: 7,032 kWh • Natural Gas Usage: 422 therms • Vehicle Usage: 571 gallons per person. Global Average: 8,750 lbs CO2 per person http://www.pge.com/includes/docs/pdfs/about/environment/calculator/assumptions.pdf

5. Greenhouse Gas Emissions Agriculture ~ 20-25% of all emissions

6. CO2 emissions per person

8. Questions • What percentage of electricity generation comes from the burning of natural gas? • What percentage of transportation energy comes from natural gas burning? • What percentage of transportation energy use comes from coal? • If you buy an electric car, what is the mostly likely source of energy? • Where does most residential energy come from?

9. Emissions of heat trapping gases

10. Indirect emissions

11. Embodied Energy

12. Apple Apple Ipod 1 Energy Unit 100-250 Energy Units Photo credit: Terry Nathan

13. Carbon Footprint of Apple products MacBook Air -2008 13-inch MacBook Pro 17-inch MacBook Pro 15-inch MackBook ProMacBook-2008 iMac (24 inch)-2008 iMac (20 inch)-2008 LED Cinema Display Mac Pro Mac Min iPhone 3G iPhone 3GS iPod nano iPod touch iPod shuffle

14. Role of Agriculture on Carbon Emissions

16. Growing Food Methane 14-18% of all emissions due to livestock U.N. Food and Agriculture Organization, 2004

17. Carbon Footprint of Food + Animal related methane emissions

20. Carbon Showdown vs

21. Emissions from Transportation • Annual transportation (USA) • 9,000 average passenger car miles Toyota Prius (50 mpg) Chevrolet Cobalt (28 mpg) Ford F-Series (13 mpg) 1.8 tons/yr 3.5 tons/yr 5.2 tons/yr US Dept. of Transportation

22. Food: Three Diets • High: • 38% animal products • All red meat • Normal: • 28% animal products • Mix of red meat, poultry and fish • Low: • 18% animal products • Chicken instead of red meat

23. Auto - Diet Comparison

24. Carbon Showdown Don’t eat a hamburger in a hummer vs

25. vs Vegan

26. Auto - Diet Comparison

27. Carbon Footprint of US Food 7% 5% 4% 83% Weber and Matthews 2008

28. Burrito Burrito (Beef): 850 calories: $6.10 Burrito (Veggie): 830 calories: $5.75 Calories per dollar: 140 CO2: 3.8 kg CO2 per dollar: 636 CO2: 0.5 kg Calories per dollar: 145 CO2 per dollar: 94

29. Climate Solutions Food Transport Housing

31. We can’t change what we don’t measure • Ecological Footprint • Good surrogate for carbon footprint • Broad assessment (housing, transport, food) • Units of measure are acres of land • Component of footprint is land required to absorb waste (such as CO2) • http://www.myfootprint.org/

33. Ecological Footprints • The amount of ecologically productive land used by individuals, cities, countries, etc. • Production and use of goods and services involve land use: have ecological footprints

34. Carbon Footprint

36. Ecological Footprint

37. Ecological Footprint Calculators • Myfootprint.org (We’ll use this one today) • Footprintnetwork.org/calculator Other related info: www.thestoryofstuff.com (Very provocative video on consumption) Sustainable energy without the hot air: (My favorite numbers book of the year!) http://www.withouthotair.com/

38. Activity • Pair into teams of two • Jointly compute your ecological footprint (average your results) • Compare to average American and speculate why they are different • Develop a strategy for how you might reduce your footprint by 20% for a week. Use the calculator to guide your reductions. • User: dilbert Pass: Dogbert7 (log onto local machine, not METR) • http://www.myfootprint.org/