In more rural areas domestic sewage and wastewater is pumped underground in a settling tank and broken down by bacteria it is then released to the soil this waste is treated by using

ANSWER:

A drainfield is used to treat the waste in the water that is released into soil.

EXPLANATION:

The wastewater enters the drainfiled via the underground tanks. This drainfield is usually constructed in an unsaturated soil. The wastewater on being discharged onto the porous soil gets filtered. In this process, the soil treats, accepts and disperses water. The water then percolates into the soil where it gets treated naturally to remove all harmful coliform bacteria, viruses and nutrients.

Answeroil-shale;

D. coal i hope that