So I do not consume meat, but it doesn't mean I want every person in the world to completely stop eating meat. If you want to understand the plethora of reasons why people don't consume eat, then I would highly recommend the book Skinny Bitch or Skinny Bastard for the guys out there. It really goes over moral/ ethical reasons, the environmental impact, as well as the impact on your health. Not only that but it exposes companies for what they are doing to help you understand why it is important to know where your meat is coming from if you decide to consume it so that you may do so with a clear conscience.
'Sodium Nitrite is a preservative that is usually present in salami, pepperoni, ham, bacon, hot dogs and other forms of processed meats. The reason why Sodium Nitrite is added to meats is because it preserves the red/pinkish color of the meat and gives it a fresh appearance, and also prevents botulism to some extent.
However when ingested in large amounts, sodium nitrite reacts with the stomach acids to produce nitrosamines, the main cause for cancer amongst animals.
Sodium nitrite consumption is also known to trigger migraine pains, and COPD form of lung diseases. Non-red meats such as chicken, tuna are comparatively safer as they do not have nitrates in them'
I would also recommend this article if you do eat meat and are unsure of the best kind to buy or what goes into the labeling/making of your meat.