A great many resources are spent in the USA on developing, caring and maintaining household lawns. Time, gas/electric energy, fertilizers, . . . the list is colossal when added on a national scale. Given the abundance of fertile soil, rain/lake water in most of north america, it is fairly easy to swap those lawns with backyard/front yard vegetable gardens. I do not know if any one is noticing, the cost of every food item nearly tripled in US retail groceries during the last 5 years. Broccoli used to be one of the most affordable produce at 60 cents a pound. About a year ago, broccoli price shot up to $2 /lb and never returned. Drought in California aside, I think the speculators are hoarding food from the commons. (After tech bubble, housing bubble, food became the next investor haven). Long story short, growing food in backyard gardens has multiple benefits to oneself and the planet at large: fresh organic food, birds/bees/butterflies in the backyard, saving $s on food, exercise, leisure & even meditative stress relief. Personally, most of my leisure goes to backyard gardening.