Quotes from people about eating meat?

I'm doing a project for school about if it's good or bad to eat meat. We have to discuss both sides and not show favor to one particular feeling. One of the required areas is quotes from people considered experts on the topic (doctors, scientists, nutritionists, ect...). I can't seem to find any for or against though. Can any of you give me some that you know of, and maybe the link as well? Thanks! :)