grenk is a line of remanufactured ink and toner cartridges designed to leave the smallest environmental footprint possible. Produced by InkCycle, grenk was the first line of ink and toner produced with zero landfill waste. The grenk line is also associated with InkCycle's Carbon Neutronic Index that allows companies to track the amount of e-waste they've diverted through the use of recycled ink.
(1) InkCycle Announces Ink Cartridge Recycling Index... 
(2) InkCycle was Green Before Green Was Cool 
(3) Corporate America Commits to Recycling Electronics...