Food waste does not always decompose in landfills, it depends on your local waste management services. Landfills must be dredged and rotated to permit oxygen to penetrate the mass and allow for biodegradable materials to decompose. Many landfills do not have the capacity, money, or manpower to keep up with demand. It is estimated that food waste in landfills degrades at a rate of about 50 percent every 20 years.
How to start composting.