Representatives of the Brazilian prison system came up a great idea, as the negative energy to turn prisoners into useful "green" energy to the benefit of the prisoners themselves. So, in a prison near Santa Rita du Sapukai, located in the mountains north of the city of Sao Paulo, all served time people have a great opportunity to reduce it, pedaling a special bike that generates green electricity.
This idea gave a local judge, and the company and the police helped her to become a reality. Prisoners thus not only bring out the will of the day, after three days of pedaling reduces jail term for one day, but also make a useful exercise for your body, allowing to lose excess weight. Electricity, which is produced bicycles during the day is stored in special batteries, and electricity from it is used at night to illuminate the river embankment in the Santa Rita du Sapukai and other non-illuminated parts of the town.
And the prisoners are readily accepted for velopoezdku in place under the strict supervision of prison guards, despite the fact that it is physically not so simple. Together with the main bonus this practice dilutes monotonous stay in jail and gives the environment megawatts of clean energy.