Although Not Directly Toxic to Living Organisms Chlorofluorocarbons (CFCs) Have

Although not directly toxic to living organisms chlorofluorocarbons (CFCs) have had unanticipated impacts on the atmosphere. The ecological impacts of CFCs will be

A) relatively benign since even as secondary pollutants their toxicity remains low.
B) limited to terrestrial ecosystem only.
C) limited to high altitude communities where ultraviolet radiation is more intense.
D) uniformly serious, with effects experienced in almost all ecosystems and trophic levels.