Bike for car exchange and tree's for blood exchange
This is 2 separate idea's First: When people park there cars they get the free use of a bike, with adequate id of coarse. If they dont bring back the bike we impound the car. This can also be done with a kiosk type set up like malls do with strollers and wheel chairs. Reduce the number of cars polluting the air. Second: Plant a tree every time someone donates a unit of blood, put there name on a plaque or in a book , plant all the trees in a public park or green location and call it the forest of life. We are saving lives and helping the earth. This would work in any city