Further, London's transport administration continues to lobby for low emission vehicles, including further funding to support the uptake of cleaner vehicles and establish a charging infrastructure.

It is only by encouraging motorists to invest in the latest, cleanest technology, regardless of vehicle or fuel type, that the green vision can be fully realized.

Another key plank in the strategy is that the government needs to have clear and strict targets that it achieves step-by-step.

The plan for an ultra-low emission zone, for example, is being announced five years in advance to give sufficient preparation time to the public. The government hopes that in the next five years, drivers will buy more low emission vehicles.

As of January 2018, all new taxis and all private hire vehicles that are less than 18 months old presented for licensing in the capital for the first time should be zero-emission capable. Cars that do not meet this standard will be charged 12.50 pounds daily.

Air pollution is a problem for many countries that are struggling to balance economic growth and environmental protection. London's plan should provide some excellent guidelines.

Pressure is growing on China's central government to deal with pollution as discontent over air contamination increases.

Even cities that cannot achieve ideal conditions can still use the example of London to reduce emissions.