Have a printer ink cartridge sitting around and not sure what to do with it? If it’s an HP cartridge, HP will pay your shipping to recycle it.
HP has been involved in recycling for a number of years, setting up retail recycling programs across the country (most notably Staples). They used to include return materials with their inkjet and laserjet cartridges, but stopped doing it a while ago to cut down on waste.
If you don’t have an HP collection point near you, you can still return your used printer cartridges to HP for free. Simply visit their recycling page, select your cartidge type (laser or jet), and print out a shipping label.