this is the clearest communication i've heard on this topic, with specific sources and analysis supporting it:

no one should be eating (agricultural) red meat. it's bad for you, its bad for the ecosystems that are displaced by meat production, and its increasingly bad for the earth as a whole

quoting the interdisciplinary report that the video opens with:
« we must rapidly reduce meat consumption if the world is going to avoid ever more catastrophic climate change and environmental decline. »

whatever your personal feeling on it is, i urge you to watch the video. the food industry, specifically the large conglomerates that own most food production in the US, have done everything they can to cultivate uncertainty about this.

https://youtu.be/eo9iKHhcZuQ

The food industry is destroying us

YouTube

i grew up eating red meat, but i haven't eaten it in years. cutting it out is the simplest and most effective thing you can do to reduce climate impact on an individual level

chicken and fish are less impactful on the environment and readily available most places. vegetables and grain are also plenty capable of giving you all the nutrients you need in your diet, and are easier to cook with, in my experience. and growing all the vegetables and grains you would need to support every american would take just 20% of the land we currently devote to agriculture that supports meat production.

@chr i've started moving more to game meats of species that are sustainable to farm and/or overpopulated... like crocodile and kangaroo.