Question : Which urban-waste disposal method involves the use of microorganisms to decompose organic waste?
Option 1: Incineration
Option 2: Landfilling
Option 3: Composting
Option 4: Recycling
Correct Answer: Composting
Solution : Composting is a method of urban-waste disposal that involves the use of microorganisms to decompose organic waste into a nutrient-rich soil conditioner.