"People seem to have a huge lack of trust in their fellow man, thinking that leftovers would be diseased somehow. It goes back to the couch-surfing thing. You're staying at a random person's place and you have to trust they aren't going to do something weird. It's the same with leftovers." — Dan Newman, quoted in a National Public Radio story about his company Leftover Swap, which will run an online marketplace for people to trade or give away leftover food. Its app is expected to launch later this month.