This app helps prevent food waste: it reminds you when you need to use food in your fridge, by using data gathered from the grocery store's cash register. Building on some other ideas, it can also recommend what to have for dinner.
There are millions of acres of parking lots in the U.S. Sometimes they're used for farmers' markets or other temporary uses, but what if some pioneering companies decided to turn their parking lots permanently into farms?
While there's a lot of focus here on local food, helping farmers transition to organic farming can have even greater benefits for the environment. We can fight global warming with dirt: if 10,000 U.S. farms convert to organic production, the amount o