To limit the red meat and processed meat consumption is a good idea, but completely avoid them seems a bit excessive.
This article cites a study where the authors talk about two recent reviews of prospective studies that concluded that the evidence is not sufficient to support the association between red meat or processed meat consumption and colorectal cancer, because the likely influence of confounding by other dietary and lifestyle factors:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3108955/

Anyway, a handful of small producers of pata negra ham offer preservatives free hams. They are quite expensive, but for those who love ham and care about their health is a good solution.

Pollution, sedentary lifestyle, solar radiation, etc., they are also very dangerous, and everything we can do to reduce their effects will be positive.

Das heißt:Verarbeitetes Fleisch mit Nitriten sollte vermieden werden.