TOEFL Listening: ETS-TOEFL听力机经 - 8C3E343QDG2WP433P$

According to the professor, what role does water play in the thermal depolymerization process? A. It reduces the amount of energy that the process requires. B. It breaks apart materials at the molecular level. C. It converts organic waste into liquid. D. It reduces the amount of waste material that the process requires.