<Tr> <Td> </Td> <Td> This section's tone or style may not reflect the encyclopedic tone used on Wikipedia . See Wikipedia's guide to writing better articles for suggestions . (January 2011) (Learn how and when to remove this template message) </Td> </Tr> <P> The list below outlines a few facts about toner / ink cartridges and the impact they have on the environment . </P> <Ul> <Li> Each year over 350 million cartridges are thrown out to landfills . </Li> <Li> By the year 2012, 500 million laser cartridges and 1.8 billion ink cartridges had been dumped in landfills . </Li> <Li> Cartridges can take up to 425 to 1000 years to decompose . </Li> <Li> Every ink cartridge becomes 3.5 pounds of solid waste . </Li> </Ul> <Li> Each year over 350 million cartridges are thrown out to landfills . </Li>

What do the numbers on hp ink cartridges mean