food per acre

Cars and cows both emit noxious gases that deplete the ozone layer. Cars, we now know, can be fuelled by plants, just like cows. The trouble is, there are billions of people on this planet who are rather fond of eating. An acre of land can grow up to 20,000 pounds of potatoes but, when that same acre is used to grow cattle feed, it produces just 165 pounds of "edible cow flesh". Cows and cars both put pressure on the planet's scant resources.

~ Jonathan Cainer