In our community in Northern Cali- a Rai dai collects beer cans from different house holds and the money earned goes for the school in Khotang. Its a continuous things that happens and we don't even realize that it happens! Not a lot of money but still helps! May be people in other areas where you can get money back for cans, can do the same. You'd otherwise throw those cans away (if you're not in the habbit of going to the store with those cans and exchanging the same for money)..that's like money gone in waste..