World Health Organization: Processed meat causes cancer

http://www.bbc.com/news/health-34615621

http://scienceblog.cancerresearchuk.org/2015/10/26/processed-meat-and-cancer-what-you-need-to-know/

This is the publication by Lancet Oncology:

http://www.thelancet.com/journals/lanonc/article/PIIS1470-2045(15)00444-1/abstract