What can be done?

(a). Explain the pH change as the cause of tooth decay. How can tooth decay caused by pH cahnge be prevented? (b). Explain how pH change int eh lake water can endager the lives of aquatic animals (like fish). What can be done to lessen the danger to teh lives of aquatic animals in the lake?

Gene therapy is a treatment that can be done with:

Treatment of e-waste can be done by

Demagnetisation can be done by