I’ve shared this a few times on this site but this BBC article [0] is pretty clear - red meat (beef in particular) is vastly worse than veg alternatives. [1] breaks it down a bit farther and shoes that the transport and processing associated with foods is a minuscule part of their impact (mostly) - the impact of processing/transporting beef is more than the entire impact of any other vegetable on the chart.

[0] https://www.google.co.uk/amp/s/www.bbc.co.uk/news/amp/scienc...

[1]