Using electricity to partially power vehicles has significant fuel economy and emissions benefits .

部分使用电能驱动汽车在燃油经济性和排放上都有很大好处。

As well as comfort , prestige and low emissions , rail is the ticket to better urbanization .

高铁不仅舒适快捷，信誉良好，碳排放量低，还是实现更高水平城市化的必由之路。

Carbon emissions are going to rise quite dramatically in the next 20 to 30 years .

答：碳排放量将在未来20到30年急剧上升。

What within the drywall is responsible for those emissions ?

而石膏板里释放出这些气体的元凶是什么？

Not that the japanese don 't care about co2 emissions .

这并不是说日本人不关心二氧化碳排放量。