Well maybe this whole idea is going to bomb, or the first question was just too general. To try to get things going I'll start off with my
answer to it.
I don't actually have any strong disagreements with what is in the book though one part that has nagged at me for a while was in Chapter 12, Vegan vs Omnivore vs Junk Food. First I feel like I need to note that I am NOT a vegan. I do try to mostly eat a whole food plant based diet which fits into the larger umbrella of vegan, but is different. Still I eat meat. In fact today for dinner I had take out Chinese of sesame shrimp with chicken fried rice and a pork egg roll. That doesn't qualify as healthy or environmental on any scale for me so please don't think I'm wagging fingers at anyone!
Anyway, in the book they note that Michael Pollan suggests in his Omnivore's Dilemma book that you might kill fewer animals as an omnivore due to conventional farming practices for vegetables which might end up killing hundreds of small critters for the same calories of food from a cow. The idea being that only the one cow was killed for those meat calories. While I think it is a potent point to make that conventional vegetable agriculture deals in mass death of critters my understanding of most such farmed food is that it is not used directly as human food but rather as "animal feed". In other words that cow was likely feed much of that "vegan" mass critter killing food. I don't know what the conversion rate is for cows with regards to how many calories need to be eaten to gain one calorie of "meat". I'm pretty sure it would be more than 10 to 1. If it was just 10 calories needed to gain one calorie of bovine body mass and as presented in the book the calories in a cow is equal to 500 dead critters from an equal number of plant based calories then a meal of that cow would really be equal to 5001 dead critters!
Having said all that, something I loved about the book is that the solution they present in this section is equally effective whether you are an omnivore or a vegan. VORP food solves the issue of mass death of critters and gives everyone a healthier diet.