Euro 4 歐盟四期

Euro 4
繁：歐盟四期
简：欧盟四期

環境局局長黃錦星在立法會大會回應指，過去3年已推出多項措施，包括分階段淘汰8.2萬輛歐盟4期以前的柴油商業車輛，而約1400架專營巴士亦將於明年年底安裝選擇性催化還原器。

黃錦星：空氣污染物較10年前明顯下降（2015年11月18日）。on.cc東網，取自 http://hk.on.cc/hk/bkn/cnt/news/20151118/bkn-20151118132938688-1118_00822_001.html

As of late last year, roughly a quarter of the 82,000 pre-Euro IV diesel commercial vehicles had been phased out under the incentive scheme, which came into effect last March.

Bus firms can’t meet Green-zone deadline. (2015, February 2). South China Morning Post. Retrieved from http://www.scmp.com/news/hong-kong/article/1698698/bus-firms-cant-meet-green-zone-deadline