How has technology been used to address issues related to sewage?
O
A. Sewage treatment plants use bacteria to clean water and solid
waste before releasing it into the environment.
O
B. Sewage treatment plants heat water to kill bacteria.
O
c. Sewage treatment plants use landfills to filter and clean water and
solid waste before releasing the water into the environment.
O
D. Sewage treatment plants cool water to kill bacteria.