Explain how you would dispose of used ink cartridges?

If you care about the environment, don't simply dump them in the trash. There are tons of places that should be more than happy to take the cartridges off your hands and even give you store credit towards your purchase of new ones. Examples that come to mind are office supply stores, public libraries, and there are several more which can be found from the link below.

Places like Staples accept them and know how to dispose properly. Lots of tech stores including staples will give you coupons or discounts on your next ink cartridge purchase as well.

Simple. A bin

2 words...... Trash Can