Students at Western Springs College were challenged to reduce littering,with the offer to donate $200 a week for three consecutive weeks, to the World Wildlife fund (WWF) to help protect the endangered Maui’s dolphin, if littering around the school decreased. However, for every piece of litter found $1 would be removed from the total. At the end of three weeks, the amount of litter found in the target area had halved and $439 was donated.