B．Encouraging carpooling and public transportation.

　　C．Charging all the vehicles more “smog fees”．

　　D．Buying new cars to replace super­dirty old cars.

　　解析：选B　细节理解题。根据最后一段中的“developing programs to encourage carpooling ...”以及“expanding or improving public transportation systems” 可知，地方政府采取的措施包括鼓励人们拼车，扩大和改进公共交通运输体系等。故选B。

　　D

　　(2016·合肥市第二次质量检测)Personal money­management website Mint. com suggests recently that responsible parents should give their kids credit cards — possibly starting as young as middle school. The website says a credit card will help children master responsible spending habits and give parents the chance to teach them some valuable lessons.

　　It's absolutely true that kids should learn about how a credit card works and how to use it responsibly. But the idea that they need a card of their own to practise is questionable.

　　Yes, credit cards are a teaching tool, but it's the time you spend educating them about money management that does the teaching, not the piece of plastic. Sit down with your child — here we are referring to teens and walk them through your credit card statements. Point out important things like the due date, late fee warning, and APR (年贷款利率)．

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