The World cancer research fund is trying to get parents to stop feeding their kids processed meat (bacon, ham, hotdogs etc)..strangely enough because the evidence in adults associating it with cancer is so overwhelming. I hope they're also advising adults give it up if the evidence is so compelling! Anyway you can read the article here
Even if you didn't give a fig about animals or the environment, why would you eat something like that?..ok why would you smoke...I get the idea, but you usually realise after a while you're just being an idiot & give up the cigs!