Monday, 30 January 2012
Rwandan prison, not a place you want to find yourself, unless you are a biogas expert.
"In order to reduce energy costs and protect Rwanda's forests, the country's 14 prison have introduced biogas burners, so they are now 75% powered by the inmates' own waste. The burners need one thing - a regular, reliable supply of waste - and jails are perfect."
Take a look at the photo-article on the BBC site below: