ANSWER: 4
Explanation:
Chinese capital city Beijing will implement the new strictest vehicle emission standards to reduce hazardous hydrocarbon emissions by 5 percent. Beijing took the lead in China in using unleaded gasoline 2007 and worked out the Beijing II gasoline standard in 2014
- Beijing also issued and implemented Beijing III, IV and V in 2005, 2008, and 2012
- Gasoline standards in Beijing are always one to two stages ahead of other Chinese cities
- Newest standards in Beijing were two or there stages ahead of other Chinese cities
- The newest standard Beijing VI will reduce vehicle hydrocarbon emissions by 5 percent.
- Beijing is expected to implement the new standard in December next year- the new strictest standard will lower emissions by 40 to 50 percent
