A man in America started collecting aluminium cans 30 years ago to help fund his grandsons' college tuition fees.
"That took a lot of cans," says Bob Johnson. "They'll get about two and a half years each."
Johnson collects and stores the cans only selling them annually around Earth Day as most companies pay more around this time.
He does have help from neighbours and friends with one friend storing two and a half tons of cans in her garage for him.
Source: The Aluminium Circle.back