> First, why do people throw away tennis shoes, unopened food etc? Because transport costs more than the item? Especially if you are travelling by plane. Sure

> First, why do people throw away tennis shoes, unopened food etc? Because transport costs more than the item? Especially if you are travelling by plane. Sure there might be cheaper transport options but the opportunity cost of arranging them quickly dwarfs the value. > Second, why not just put on the street so that other people can come and collect items? If you are in a university setting where maybe 500 people are leaving all at the same time, i imagine university admin may not be thrilled at the prospect of cleaning up after this.