Liquid carbon dioxide with a suitable detergent is an alternative solvent to tetrachloroethene in dry cleaning. What kind of environmental damage is prevented by avoiding the use of tetrachloroethene? Is the use of liquid carbon dioxide with detergent appropriate from a pollution perspective? Explain.

• A
  It prevents groundwater contamination and is non-carcinogenic.
• B
  It reduces ozone layer depletion.
• C
  It prevents soil erosion.
• D
  It prevents acid rain.