the only argument i see at the is towards then end sustainable and energy cost. well for everyone in the planet to eat even close to a vegan life style would destroy the soil. which with destroyed soil comes in door growing. indoor growing which in now based more on product cost to run the facility and lights for cloudy days ramping up energy and pollution.

Also.... having a voice for animals...... plants make less noise then animals and are just as much a living creature as any animal that we eat.