General assumptions: Life cycle from the earliest stages of production to the retail distribution center.
Material is included.
Production is included.
Distribution is included.
Use is not included.
End of life is not included.
Scarborough, P., Appleby, P. N., Mizdrak, A., Briggs, A. D., Travis, R. C., Bradbury, K. E., & Key, T. J. (2014). Dietary greenhouse gas emissions of meat-eaters, fish-eaters, vegetarians and vegans in the UK. Climatic change, 125(2), 179-192. URL: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4372775/