Some initial thoughts.
In "Eat Food: Food Defined" (p. 161), he writes, "Depending on how we spend them, our food dollars can either go to support a food industry devoted to quantity and convenience and "value" or they can nourish a food chain organized around values--values like quality and health. Yes, shopping this way takes more money and effort..."
What are your thoughts on this? I often see people exhorting others in the forums here to reduce their grocery bills (and I've certainly done the same), but eating sustainably is just not cheap.
I agree with Pollan that a mostly plant-based diet is probably optimal for most of us. But there's something about the way he discusses meat that just rubs me the wrong way. For instance, when he talks about vitamin C on p. 164 ("Mostly Plants: What to Eat"), he makes us seem as if we need SO much vitamin C, that only an incredibly plant-rich diet could provide. But I dunno; one orange a day would do it. On the other hand, many other plants don't have particularly high amounts of vitamin C.
He seems more dismissive when he talks about vitamin B12 on the next page. We need a "tiny amount," which is technically true. The RDA for vitamin B12 is 2.4 micrograms (vs. 75-90 g. of vitamin C), but 3 oz. of chicken has only 0.3 to 0.4 mcg. OTOH, liver and shellfish are bursting with it.
But why gush about vitamin C, only to consign B12 to be "an exception" and imply that it's not really that important? Also, I believe he's wrong when he says that B12 can be obtained from fermented vegetables. I'll pull a source later.