To summarize his infographic. Pork, Chicken, and farmed seafood are better than some plant-based options, and worse than some other plant-based options. The graph seems to leave off some of the famous outliers (like wild-caught seafood).
Unfortunately the graph leaves out a lot of important variables, like the usability of the land (whether growing corn on an acre that can support a forest is better or worse than having pork on an acre that cannot support much plantlife). It also uses global averages, which leaves out situations where many regions may be looking at entirely different calculations.