Final answer:
The statement is true; the Montreal Protocol has led to a ban on the manufacture and importation of CFCs in the United States, with legal sources of CFCs for servicing equipment being limited to recovery, recycling, and reclamation.
Step-by-step explanation:
The statement that CFCs can no longer be legally manufactured or imported into the United States and that supplies for equipment servicing can only come from recovery, recycling, and reclamation is true. The Montreal Protocol, established in 1987, is an international agreement to phase out the production of ozone-depleting substances, including CFCs. Subsequently, in the U.S., production and importation of these chemicals have been halted.
Due to their long lifespan in the atmosphere and their contribution to ozone layer depletion, these synthetic compounds have seen a global effort to halt their production and implement alternatives. Recovery, recycling, and reclamation have become the only legal sources of CFC refrigerants for servicing existing equipment. This is an important step towards the recovery of the ozone layer, though emissions of CFCs from other sources, including illegal production, continue to pose challenges.