Two words: Big Trash. (Why Doesn't Your City Have Curbside Composting?
The Center for a Competitive Waste Industry also points out that there are climate-related reasons to keep organic waste out of landfills. Methane is 20 times more potent than other greenhouse gases, and while dumps can capture a some of the gas released from rotting pills of plant matter, they aren't capturing anywhere near all of it. A May 2011 report from the US EPA found that composting all the food scraps in California alone would cut emissions by 5.8 million metric tons each year.