There are environmental benefits to refilling the toner cartridges of laser printers. The environmental impact of the toner itself is the same whether it is delivered in cartridges or by itself, but a single cartridge is reused several times, eliminating much of the impact of manufacture and distribution.
Toner cartridges are made from plastic and small amounts of other materials. The plastic in each cartridges takes approximately 3.3 liters of oil to produce[citation needed] . 4 liters of petroleum are also burned to manufacture one toner cartridge, releasing the equivalent of .01 metric tons of CO2 into the atmosphere[citation needed]. Thus refilling rather than replacing a cartridge saves approximately 7.3 liters of petroleum and releases 0.1 metric tons less CO2. Refilling also avoids discarding a spent cartridge into landfill, where it would take minimum 450 years to thousands of years for some parts to decompose.
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