Amazingly, it is sometimes a criminal act to retrieve food that has been thrown away. Often it is simply seen as culturally inappropriate or embarrassing. But when an estimated $165 billion worth of food gets thrown away in the U.S. every year, surely it’s time to change our attitudes about food waste.
That was the point behind Rob Greenfield's cross-country bicycle trip this fall. To call attention to the amount of food that is wasted, the San Diego activist spent months on the road, surviving entirely on food that he pulled out of dumpsters behind grocery stores and pharmacies.
Typically Greenfield would arrive in town on his bicycle and start to rummage through dumpsters. He usually emerged with perfectly good food – bunches of bananas, apples, boxes of unopened crackers and cookies, packs of soda, bottles of iced tea, and a smorgasbord of other perfectly edible food. Then he would take a photo of the haul of "waste."
In a trip that took him to some 300 dumpsters, Greenfield estimates that he recovered over $10,000 worth of food and fed well over 500 people. On his website, Greenfield posted many photos of his dumpster harvests. 
Greenfield said, “I’ve learned that I can roll up in nearly any city across America and collect enough food to feed hundreds of people in a matter of one night. The only thing that limited me was the size of the vehicle I had to transport it. My experience shows me that grocery store dumpsters are being filled to the brim with perfectly good food every day in nearly every city across America, all while children at school are too hungry to concentrate on their studies." About 50 million of 317 million Americans are food insecure, he notes.