Seriously. The PB&J Campaign is all about global warming (excuse me, Climate Change).
Here's a brief little bit from their home page:
A PB&J will slow global warming.
Next time you have one you'll reduce your carbon footprint by saving the equivalent of 2.5 pounds of carbon dioxide emissions over an average animal-based lunch like a hamburger, a tuna sandwich, grilled cheese, or chicken nuggets.
That's about forty percent of what you'd save driving around for the day in a hybrid instead of a standard sedan.
If you have a PB&J instead of a ham sandwich or a hamburger, you save the equivalent almost 3.5 pounds of greenhouse gas emissions.
A PB&J will also save water.
That's about 280 gallons of water over the hamburger. To put this in perspective, three PB&Js a month instead of hamburgers will save about as much water as switching to a low-flow showerhead.
A PB&J will save land.
Have a PB&J and save 12 to 50 square feet of land from deforestation, over-grazing, and pesticide and fertilizer pollution.