Question

What can be inferred about bacteria? *
They are dangerous in water. They can sometimes be helpful to us. They must be kept in water. They cannot be killed with chemicals.

Answer 1

Respuesta:

To prevent contamination with germs, water companies add a disinfectant—usually either chlorine or chloramine 1—that kills disease-causing germs such as Salmonella, Campylobacter, and norovirus.