【正确答案】
A
【答案解析】[听力原文] A rise in the concentration of health-threatening dust particles causing pollution in many Italian cities has prompted the government to act. A host of new measures have been put on the table for the whole country. They include encouraging local councils to replace ageing buses with more environ-mentally friendly ones and incentives for drivers to trade in their cars for less polluting vehicles. It all comes at a cost. 'On top of these measures there will also be discounts on public transport, bus and city metros. These discounts are supported by a fund of 12 million euros which will be made available by my ministry from the last day of the year.' The government's move follows this week's introduction of traffic and speed restrictions in Rome, Milan and several other cities. But the action failed to curb pollution levels. Rockets, firecrackers and flares have been banned in public spaces in Milan, Bologna and Turin. But environment activists said the measures do not go far enough. What is the news report mainly about? 新闻开头就明确了新闻背景和主题，由于粉尘浓度上升致意大利多个城市污染严重，所以各地推出控制空气污染的新措施。新闻后面的内容进一步列举了各种措施，如对使用公共交通的折扣，对交通的管控等。由此可知，A项内容是新闻的主题，为答案。B、C、D三项都是具体措施，不能概括这则新闻，故排除。