A model for ‘sustainable’ US beef production - If Americans reduced their mean beef consumption from the current ≈460 g per person per week to ≈200 g per person per week (corresponding to f = 0.5), the US beef industry could become environmentally sustainable.

See the source article by following the link below:
A model for ‘sustainable’ US beef production - If Americans reduced their mean beef consumption from the current ≈460 g per person per week to ≈200 g per person per week (corresponding to f = 0.5), the US beef industry could become environmentally sustainable.