In general terms refers to the process of converting decomposable organic materials into useful and stable matter to be used as fertilizer and soil amendment.
Current situation in US
As per latest figures published by the Environmental Protection Agency (EPA), Americans generated a total of 251 million tons of solid waste (MSW) which ended up in landfills in 2012, please refer to EPA for complete article. Even though per capita MSW has decreased from last decade, absolute amount of waste or trash generated and processed by landfills in the country has increased. US generated approximately 209 million tons in 1994.