human
What is a "septic tank" and why is it important?
assistant
A septic tank is a water-treatment system that removes waste from the home. It works by using bacteria to break down organic matter in the tank, which produces methane gas as a byproduct. The gas then passes through a pipe into the soil where it breaks down naturally. This process helps prevent pollution of groundwater supplies, reduces odors, and keeps the area around the tank clean and safe.