Question

scrubbers use either liquids or dry, absorptive materials to reduce pollution at the source in many industrial processes. which of the following explains why about 30% of coal power plants in the united states do not use scrubbers? choose 2 answers: a many plants are exempted because they were built before regulations. b scrubbers are expensive to install. c scrubbers are not effective at reducing pollution. d the sulfur oxides scrubbers collect are not harmful to humans.

Explanation:

• Option A: Older plants may be exempt from regulations requiring scrubbers.
• Option B: High installation costs can deter plants from using scrubbers.
• Option C is incorrect as scrubbers are effective at reducing pollution.
• Option D is incorrect as sulfur oxides are harmful to humans.

Answer:

A. Many plants are exempted because they were built before regulations.
B. Scrubbers are expensive to install.