As Hong Kong transitions from an outdated communist monetary system to a more market-based style, the prices of virtually all goods and services have not been restricted by the government and were allowed to float freely. on the market. One of the few omissions in this vital transformation has been the price of fuel. Not only does the government control the price of fuel, it also punishes anyone who sells gas above the cap. This cheap gas favors its use at a time when its consumption should be restricted. Oil prices are at record highs everywhere, but Hong Kong is just starting to consume gas and oil at an incredible level. Vehicle use in Hong Kong takes a toll on the ecosystem as more and more people own cars while continuing to use poor quality gasoline. Air pollution is largely caused by automobile exhaust. Vehicles running on diesel generate, among other things, the majority of exhaust gases. This is because combustion will not always be finalized in diesel using car engines. Thus, they produce a lot of toxic gases like carbon monoxide, nitrogen monoxide, especially lead, among others, which harm the brain development of children, seriously harming their well-being. In addition, vehicles release suspended particles which damage the respiratory system. Hong Kong's air quality is so bad that the air pollution index reached 140 during the year.