Defra funded study of beef, tomatoes, etc

Williams, A.G., Audsley, E. and Sandars, D.L. (2006)

Determining the environmental burdens and resource use in the production of agricultural and horticultural commodities.
Main Report. Defra Research Project IS0205. Bedford: Cranfield University and Defra.

Available on www.silsoe.cranfield.ac.uk, and www.defra.gov.uk

Using this paper the following have been calculated for the CO2e of various foods:

Quantity Food kg CO2e
1500g Flour 1.2
6 Eggs 1.65
454g Lamb chops 7.72
350g Pork chops 2.24
750g Chicken 3.45
342g Beef steak 5.47
500g Tomatoes 4.70
1000g Potatoes 0.24

Williams, A.G., Audsley, E. and Sandars, D.L. (2006)

Determining the environmental burdens and resource use in the production of agricultural and horticultural commodities.

Main Report. Defra Research Project IS0205. Bedford: Cranfield University and Defra. Available on www.silsoe.cranfield.ac.uk, and www.defra.gov.uk

These use a GWP(100years) for methane.

This is a table of data from Adrian Williams model

Quantity Unit Food kg CO2e(20) kg CO2e(100)
1,000 kg dwt Beef 25231 13989
1,000 kg dwt Pig meat 7249 5380
1,000 kg dwt Poultry 3978 3996
1,000 kg dwt Sheep meat 26095 14279
20,000 eggs Eggs 4314 4206
10,000 litres Milk 18633 10229

Using CO2e(20years) gives this update of the animal products in the table above

Quantity Food kg CO2e(20)
6 Eggs 1.29
454g Lamb chops 11.85
350g Pork chops 2.54
750g Chicken 2.98
342g Beef steak 8.63

The New Scientist says

Their analysis showed that producing a kilogram of beef leads to the emission of greenhouse gases with a warming potential equivalent to 36.4 kilograms of carbon dioxide. It also releases fertilising compounds equivalent to 340 grams of sulphur dioxide and 59 grams of phosphate, and consumes 169 megajoules of energy (Animal Science Journal, DOI:

http://www.newscientist.com/article/mg19526134.500-meat-is-murder-on-the-environment.html

The Animal Science Journal says:

The present results showed that the total contributions of one beef calf throughout its life cycle to global warming, acidification, eutrophication and energy consumption were 4550 kg of CO2 equivalents, 40.1 kg of SO2 equivalents, 7.0 kg of phosphate (PO4) equivalents and 16.1 GJ, respectively.

http://www.blackwell-synergy.com/doi/abs/10.1111/j.1740-0929.2007.00457.x