Kowloon Motor Bus is planning to spend HK$7 million on 250 new eco-friendly buses this year to reduce gas emissions and fuel consumption.
The bus company announced the plan to replace its old buses with greener models last week when it unveiled a new double-decker it would introduce next month.
The new model meets the Euro 5 emission standards - it releases at least 40 per cent less nitrogen oxide than most buses on the road.
The buses will be the first vehicles in Hong Kong to meet this standard.
KMB, the city's largest bus operator, has about 3,800 buses. About 1,500, or 40 per cent, meet the less green Euro 4 emission standards.
The new double-decker has an intelligent gearbox. It selects the best gear for the road environment. This also means it uses less fuel. It also saves electricity by using LED lighting, which lasts longer than the fluorescent tubes used on present bus models. LED tubes also contain no mercury.