Lots of charities collect empty printer cartridges to raise money by refilling and reselling them. Take a look online to find charities in your area that collect print cartridges.
You can take used ink cartridges back to the shop you purchased them from or post them back to the manufacturer. Often, cartridges include a mailing label to send them back.
Used print cartridges can also be taken to a Recycling Centre for recycling.
Choose to reuse
Some printer cartridges can be refilled with a store bought refill kit. When buying your printer, choose one that uses cartridges that can be easily refilled or that is compatible with generic or refillable cartridges.