A Billion Batteries

US schoolboy Sri Nihal Tammana launched a battery recycling campaign when he was 10-years-old. Four years on, he has formed a partnership with the largest battery recycling non-profit in North America, mobilised hundreds of kids to place over 500 battery bins across the US and recycled over 265,000 batteries. This documentary for the BBC World Service follows his journey. (Image credit: Vamsi Tammana)