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.

Your 'Pringle' contains 30% potato, that yoghurt has the same amount of sugar as ice cream, that whole grain cereal bar may be no better for you than a snickers.

I'm not a vegetarian. Now, don't get me wrong - I like animals. And I don't think it's just fine to industrialize their production and to churn them out like they were wrenches. But there's no way to treat animals well when you're killing 10 billion of them a year. Kindness might just be a bit of a red herring. Let's get the numbers of animals we're killing for eating down, and then we'll worry about being nice to the ones that are left.

This evidence is overwhelming at this point. You eat more plants, you eat less other stuff, you live longer.

If price spikes don't change eating habits, perhaps the combination of deforestation, pollution, climate change, starvation, heart disease and animal cruelty will gradually encourage the simple daily act of eating more plants and fewer animals.

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.