Although there are many types of emissions, such as from factories, these zones predominantly target exhaust fumes from vehicles, poisonous gases called nitrogen dioxide.

尽管排放的类型有很多，比如来自工厂，但这些区域主要针对车辆排放的废气，一种叫做二氧化氮的有毒气体。

The company’s latest statement indicated wider problems with issues about other types of emission, and implied these some petrol vehicles are also affected. Andrew Walker.

大众最新声明表明存在其它排放问题，并暗示其它类型车辆也遭受影响。安迪·沃克的报道。

The president says he wants a 40 percent reduction over the next 10 years in the types of emissions that many scientists say contribute to climate change.

总统希望在接下来的10年内减少众多科学家认为造成气候变化的40%温室气体排放。