I came across a very interesting "scientific" study that sought to investigate if there is a link between red or processed meats and increased cancer risk. Well, the findings are not surprising. Here is the conclusion:
Both red and processed meat intakes were positively associated with cancers of the colorectum and lung; furthermore, red meat intake was associated with an elevated risk for cancers of the esophagus and liver.
Is it really worth it? Our bodies are designed to eat plant foods. A diet centered around starchy plants, fruits, and vegetables gives us the best chance to live a long and healthy life. The best source of information I know of for plant based nutrition is www.drmcdougall.com.