I heard this from the Environment Report. It isn't really a practical idea that will reduce your carbon footprint and we're not going to eat our way out of this particular minor ecological catastrophe. However, it's a fun illustration of a sustainable mindset.
Garlic mustard is a weed that is crowding out wildflowers and inhibiting seedling trees. Conservationists are pulling these guys out of the ground all over the northeast and tossing them in the garbage. Here we go again, throwing away anything we don't want. According to the story, that's a bit of a waste because they are edible. Brought to the new world by immigrants, they are apparently pretty tasty. The seeds taste like mustard; the leaves, like garlic; and the roots, like horseradish.