Try not purchase refillable lighters. Zippos are refillable with Butane, and instead of throwing your empty lighters out, refill them.
There are usually some stores in the mall that can refill your lighters. Zippo does not only use butane(They only use butane in Zippo Blu s), the more known Zippo uses Synthetic Isoparaffinic Hydrocarbon Fuel. Thanks CVJX for that tip.