Questions 27 to 28 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news. Why the aviation fuel is more harmful to the environment than others
A．Because of the poisonous quality. B．It has to do with the position of the pollution. C．The aviation fuel is special. D．There is too much dirt in its resulting smoke.