it's pretty cool, I dunno if you read about this, but maybe it should be implemented other places aswell
This Vending Machine Takes Bottles And Gives Food To Stray Dogs In Exchange | Bored Panda
The machine works because the profit from the recycled bottles covers the cost of the dog food that the machine dispenses. Istanbul is known for its high number of stray dogs – some estimates say that there are as many as 150,000. Some locals love having the dogs around, who have adjusted so well to city life that they stop at traffic lights and walkways, but others want to get rid of them because of their aggression and their role as disease vectors.