I probed for a couple of answers to questions posed in class today:
a. The pictures of whole families and their diets across the world, I believe, came from Hungry Planet: What the World Eats. The authors visit 30 families in 24 countries for 600 meals in all. This was not a scientific study, and should be taken that way, but it offers a beautiful snapshot of a 'typical' family in each country.
b. The High Energy Cost of Livestock graphic from the NY Times' Rethinking the Meat-Guzzler article - comparing the energy intensity of a 6 oz. beef steak versus 1 cup of broccoli, 1 cup of eggplant, 4 oz. of cauliflower, and 8 oz. of rice - was a bit closer to apples-to-apples than apples-to-oranges that was brought up in class. The two quantities are calorically equivalent (at 320 cal) but obviously not nutritionally equal. Since calories were the base of comparison for most everything food-related in the lecture, I think the comparison is quite legitimate.