Regarding environmental issues, which of the following statements is true_________
A. Rainwater with pH > 7 is called acid rain
B. Marble carvings are not afraid of acid rain
C. Coal combustion should add appropriate substances to reduce sulfur dioxide in exhaust gas
D. Waste batteries contain Hg and Pb elements that do not pollute the environment and can not be recycled
Answer:C
Regarding environmental issues, which of the following statements is true_________
A. Rainwater with pH > 7 is called acid rain B. Marble carvings are not afraid of acid rain C. Coal combustion should add appropriate substances to reduce sulfur dioxide in exhaust gas D. Waste batteries contain Hg and Pb elements that do not pollute the environment and can not be recycled