The most efficient method of biodegradable urban solid-waste management is

Composting is the most efficient method for biodegradable urban solid waste, turning organic matter into useful manure.

Landfills merely bury waste and can pollute soil and groundwater without recovering its value.

Pelletization suits mixed refuse-derived fuel and is not ideal for biodegradable organic waste.

Gasification is a high-temperature energy process better fitted to non-organic or mixed waste.

Composting relies on natural microbial decay of kitchen and garden waste.

The resulting compost enriches soil and closes the nutrient cycle.