Eco Footprint

I am told I will need three and a half Earths to live my lifestyle. My main problems are in my food purchases, and then some problems in transportation and my home living. Unfortunately I am very conscious in what I eat, and have an important diet I like to keep up of high protein. I do not see how I will be able to change this without compromising my diet. My housing is not preferred and will change soon, so maybe that will help. My transportation could use some work, but also will not be convenient to change, and my roommate has a very different schedule which rules out carpooling most of the time. At least, I understand where I have problems, and i know where to focus on them.