A la peanut butter sandwiches

The Amazing Mumford on Sesame Street may have been right: Peanut butter and jelly sandwiches are magic. They could help save the world.

According to the PB&J Campaign's website, this classic kid's sandwich lowers your lunch's carbon footprint by 2.5 pounds of CO2 over a tuna sandwich, grilled cheese, or hamburger.

How does this work? Well, simply explained, a meat-based lunch requires a lot more energy, land, and water resources to produce than a lunch that comes from plant sources. Peanut butter, jelly, and bread are pretty low-impact foods.

If peanut butter sticks to the roof of your mouth, the campaign has recipes for equally earth-friendly alternatives.

Cook a batch of vegetarian chili, stir up some black bean soup, stuff a falafel in a pita, try General Tso's Tofu, or roll together a bean burrito. They're all tasty and can help slow global warming.

But the easiest way to start is with good ol' PB&J. Pack a sandwich for yourself, your kids, and your spouse today. Grover will be proud.