Final answer:
Old power plant facilities have not been kept operating and expanding their capacity. Many older power plants have been retired and replaced with newer, more efficient facilities. Newer facilities are designed to have lower emissions and are more environmentally friendly.
Step-by-step explanation:
False. The statement is incorrect. Old power plant facilities have not been kept operating and expanding their capacity. In fact, many older power plants have been retired and replaced with newer, more efficient facilities. The reason for this is not because older facilities have minimal contributions to smog and acid rain, but because newer facilities are designed to have lower emissions and are more environmentally friendly.