The issue of snacking is complicated. In principle, "grazing" is probably a good idea. It would even out the insulin spikes and things like that from eating large meals. The problem is it makes it harder for people to control the amount they're eating.

People forget that eating represents their most profound engagement with the natural world. Through agriculture is how we change the world, more than anything else we do.

Don't eat breakfast cereals that change the color of your milk.

A vegan in a Hummer has a lighter carbon footprint than a beef eater in a Prius.

The ninety-nine cent price of a fast-food hamburger simply doesn't take account of that meal's true cost--to soil, oil, public health, the public purse, etc., costs which are never charged directly to the consumer but, indirectly and invisibly, to the taxpayer (in the form of subsidies), the health care system (in the form of food-borne illnesses and obesity), and the environment (in the form of pollution), not to mention the welfare of the workers in the feedlot and the slaughterhouse and the welfare of the animals themselves.

If it came from a plant, eat it; if it was made in a plant, don't.

The environment is not just around you, it's passing through you.