maybe the world will have to go vegan ?

A BBC environmental analyst writes an article "Plant-based diet can fight climate change - UN"
https://www.bbc.com/news/science-environment-49238749

Perhaps human health and environmental health are directly correlated.  But industrialization is compelling for all kinds of reasons. "Dr Freud" - please tell us how do we balance the instinctual "unlimited growth" impulse? Freud sez - knowledge has got to be the answer...unless, that is, we want to wait for nature to take care of it for us (lemmings off the cliff version).

So we have a plant based message for the environment and a plant based message for human health.

Meanwhile T. Colin Campbell's work created so much backlash it's been virtually forgotten. The message itself is quite simple: animal proteins are carcinogenic. He also has the broader message that nutrition is the critical foundation piece in health, and that a plant based diet is best, but that in itself is not such an unusual message.

"Animal proteins are carcinogenic" is quite unusual, heretical even, as it reverses long held ideas about what is good for us.

Campbell was a carcinogenicity researcher (among other things). The lab research showing that animal proteins are carcinogenic (which preceded the China Study by years) was simple - give the test animals high doses of a known carcinogen to make them cancer prone, then give them diets with no animal protein compared with diets of increasing % of calories from animal protein. Then he cycled the test animals on and off the diet with protein. The result was clear, add protein and tumors begin to form. Cycle off protein and tumors begin to recede, cycle on again and tumors begin to grow again. Campbell said the result was so clear it was like turning a light switch on and off.

To the best of my knowledge this study has been replicated, and not a one off, or a mistake.

Does this translate to humans? Not directly, first of all we are not shot up with high doses of carcinogenic chemicals to make us cancer prone. Right? Only 1 in 2 of us will have the diagnosis at some point in our lives. All of Campbell's test subjects got cancer when fed animal protein. Second, we are not mice, but mice are omnivores and so are humans. BTW omnivorous does not connote "optimal" diet, it is what a species will eat to survive when calories are scarce. It is increasingly obvious the optimal diet for humans is plant based.

And the backlash against the "animal proteins are carcinogenic" message is being whittled away gradually, most recently when the World Health Organization said red meat is a probable carcinogen. It's going to take awhile, meanwhile a big fad diet now is "carnivore" where nothing is consumed except meat. Nice of them to volunteer for an epidemiologic study:)