Co2 Emissions Of Foods And Diets

CO2 Emissions by Diet

chicken milk eggs beef (grain fed) pork lamb fish (avg value) animal total

avg american vegan lacto-ovo mad meat eater tonnes CO2 % of tonnes CO2 % of tonnes CO2 % of tonnes CO2 /yr calories /yr calories /yr calories /yr 0.12 5.2% 0.12 0.44 11.4% 0.92 23.6% 0.19 0.06 1.4% 0.17 4.2% 0.61 3.2% 3.81 0.70 5.6% 2.49 0.06 0.2% 0.06 0.8% 2.05 27.7% 0.00 0.0% 1.08 27.7% 6.60

veg (avg value)

0.14

72.3%

0.19

100%

0.14

72.3%

0.10

total

2.19

100%

0.19

100%

1.22

100%

6.70

Assumptions 3,774 Kcal a day

1,377,510 Kcal a year

CO2 Emissions by Food Type Kcal protein gr CO2 gr CO2 gr CO2 Kcal FF /Kcal food Kcal FF (FF) (methane) (total) tonnes CO2 /Kcal protein (% protein) /Kcal food /Kcal food /Kcal food /Kcal food /Kcal food chicken 15.9 34.5% 5.52 1.53 0.14 1.67 0.0000017 milk 18.9 25.6% 4.85 1.35 1.47 2.82 0.0000028 eggs 27.8 32.3% 8.93 2.48 0.45 2.93 0.0000029 beef (grain fed) 34.5 43.5% 15.63 4.34 9.48 13.82 0.0000138 pork 66.7 40.0% 27.03 7.51 1.52 9.03 0.0000090 lamb 200.0 43.5% 83.33 23.15 2.82 25.97 0.0000260 fish (avg value) herring tuna salmon (farmed) shrimp

2.0 20.0 40.0 142.9

45.5% 83.3% 43.5% 76.9%

veg (avg value) corn soy apple potatoes FF = Fossil Fuels Assumptions + Conversions 3.97 btu/kcal

21.74 0.91 17.24 17.54 111.11

6.04 0.25 4.79 4.87 30.86

6.04 0.25 4.79 4.87 30.86

0.0000060 0.0000003 0.0000048 0.0000049 0.0000309

0.50 0.40 0.24 0.91 0.81

0.14 0.11 0.07 0.25 0.23

0.14 0.11 0.07 0.25 0.23

0.0000001 0.0000001 0.0000001 0.0000003 0.0000002

gr CO2 = grams CO2 equivalence

1000000 gr/ton

0 ton co2/btu ff 0 ton co2/kcal ff

0.28 gr co2/kcal ff

Table 2 from Report (underlying values from Pimentel) 100 x 100 x Kcal protein Kcal protein Kcal output /Kcal input /Kcal total /Kcal input chicken 6.3 2.9 18.1 milk 5.3 3.9 20.6 eggs 3.6 3.1 11.2 beef (grain fed) 2.9 2.3 6.4 pork 1.5 2.5 3.7 lamb 0.5 2.3 1.2 fish (avg) 4.6 (table 3) herring 50 2.2 110 tuna 5 1.2 5.8 salmon (farmed) 2.5 2.3 5.7 shrimp 0.7 1.3 0.9 veg (avg) 200 (figure 3) corn 250 soy 415 apple 110 potatoes 123

http://www.epa.gov/climatechange/emissions/downloads/emissionsfactorsbrochure2004.pdf lbs co2 tons co2 /mmBtu /mmBtu natural gas 116.39 0.0528 0 lbs to tonnes fuel oil 159.66 0.0724 motor gasoline 154.91 0.0703 diesel 160.3 0.0727 bituminous coal 203.99 0.0925 http://www.epa.gov/climatechange/emissions/ind_assumptions.html National average emissions factor for electricity is 1.37 pounds CO2 per kilowatt-hour

mad meat eater avg american on diet chicken lover % of tonnes CO2 % of tonnes CO2 % of calories /yr calories /yr calories 5.0% 0.080 5.2% 0.64 0.28 5.0% 0.291 11.4% 0.037 1.4% 20.0% 0.402 3.2% 20.0% 0.462 5.6% 0.038 0.2% 0.042 0.8% 50.0% 1.35 27.7% 0.64 27.7% 50.0%

0.091

72.3%

0.14

72.3%

100%

1.44

100%

0.78

100%

kg CO2 lbs CO2 (total) (total) /100 Kcal /100 Kcal food food 0.167 0.368 0.282 0.620 0.293 0.645 1.382 3.040 0.903 1.986 2.597 5.713 0.604 0.025 0.479 0.487 3.086

1.329 0.056 1.054 1.072 6.790

0.014 0.011 0.007 0.025 0.023

0.031 0.024 0.015 0.056 0.050