I got one...
In prison and you want power? Put the fuckers on excercise bikes and peddle yourself some electricty. Peddle your ass out of jail, now that is what I would consider "carbon credits".
California prison gets solar power plant - BLYTHE, Calif., May 28 (UPI) -- Ironwood State Prison officials in California say they've activated a new 1.18 megawatt solar power plant. [upi.com]