Respuesta :
Answer:
What coated the insides of Roman water pipes was mineral deposits.
Explanation:
Back in ancient Rome the water was rich in minerals, that would create a crust inside the aqueducts by deposition, coating the pipes and protecting the water from lead contamination.
Over time, the build-up of mineral deposits can clog the pipes, which requires periodic maintenance, in many cases the coating of the pipes could be accidentally removed.
