I have to agree that it would be very hard for this planet to sustain the amount of people it has if everyone shifted to 'natural' green type eating.
However, it should be known that food production (especially meat production) is the number one most polluting industry on the planet, as well as horribly resource consuming (energy/water).
And that's already admitting that we don't feed the whole planet as it is. In fact, most of the planet doesn't eat like us.
Clearly we're doing something wrong.
As westerners we do eat far too much meat. We've gotten spoiled. It's all about finding the balance. And giving up little convienances for the good of the planet, each other, and ourselves.
The fight for sustainability is being waged on all fronts. Just like we need to watch how we produce and consume energy and other products, we need to be aware how we produce and consume food. It's really all part of the same ball of wax.
It's just not something our rich society wants to hear.
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