If you paid nearly $1 million for your electricity each year, wouldn’t you try to be more energy efficient? That’s what is happening at India’s Tihar Central Jail. The 11,000-person jail is on a quest to become the world’s greenest jail by implementing all sorts of changes. Director General B.K. Gupta plans to add solar power units, biogas plants, an intensive recycling program and a rainwater harvesting system. He also plans to shut off the electricity in some areas of the prison from 7 to 9 a.m. and 3 to 5 p.m. in the winter. The Indian government has committed more than $105,000 to the project, which is half of the money Gupta will need to implement his plan.