Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?

Step-by-step solution

CO 2 is used in dry cleaning is a better strategy to control environmental pollution. Liquid carbon dioxide is better to replace conventional halogenated solvents which are potentially carcinogenic. These detergents are developed in a way that one end of the molecule is soluble in non-polar substances like grease, oil stains and the other end dissolves in liquid carbon dioxide.