Imagine when you take out leftover food and throw it away, and a volunteer in front of the bucket tells you to separate the waste. If you have two options, one is to do it by yourself, and the other is not to sort the waste or even to give it to the volunteer for sorting. If the volunteer were a stranger, which one would you choose? If the volunteer were a friend, which one would you choose?
Click here for original story, Study finds familiarity promotes resident cooperation with volunteers in waste separation
Source: Phys.org