Our demand for meat, dairy and refined carbohydrates - the world consumes one billion cans or bottles of Coke a day - our demand for these things, not our need, our want - drives us to consume way more calories than are good for us.

Keeping some calorie-dense food in your diet-whether it is meat, pasta, beer, or cake-allows you to reach satiety more quickly and easily. And this will keep you from feeling deprived.

We need to demonise soda, the way we've demonised cigarettes.

If you embrace moderation, eat whole foods instead of junk, live within your physical, monetary, and environmental budget rather than constantly exceeding it, you will lose weight, tread more lightly on the planet, and gain satisfaction from these things.

Let me pose you a question. Can farm-raised salmon be organic when its feed has nothing to do with its natural diet, even if the feed itself is supposedly organic, and the fish themselves are packed tightly in pens, swimming in their own filth?

Vegan or not, gluten-free or not, Erin McKenna's donuts are the best I've had in 20 years, without exception.

Anyone can cook, and most everyone should.