The Tokyo Olympic Committee plans to make about 5,000 Gold, Silver, and Bronze medals for the Olympic and Paralympic Games from used mobile phones and other consumer electronics. The project aims to promote sustainability and reduce costs. The Japanese people are asked to donate their old electronics at collection sites in local offices and telecom shops. The collection boxes will remain until enough have been collected to produce the medals. I have no idea how many old phones are needed to make 5,000 medals, but I'm thinking it must be a lot.