https://www.nytimes.com/2019/09/30/health/red-meat-heart-cancer.html
Researchers have estimated that, on average, beef has about five times the climate impact of chicken or pork, per gram of protein. Plant-based foods tend to have an even smaller impact.
Reducing food’s environmental impacts through producers and consumers
https://science.sciencemag.org/content/360/6392/987/tab-figures-data
origin - https://www.pipiscrew.com/?p=15389 eat-less-red-meat-scientists-said-now-some-believe-that-was-bad-advice