Volatile organic compounds in oil and gas react with nitrogen oxides in the atmosphere through photochemical reactions under the sun's ultraviolet rays, forming toxic photochemical smog. Scientific studies abroad have shown that the peak volatility of oil and gas occurs around 2 p.m. during the hot afternoons of summer. Experts explain that after oil vapor recovery, the amount of this toxic smoke naturally decreases, which can help reduce the formation of smoggy weather in cities.

Fuel evaporation occurs at various stages, including storage, loading, transportation, and refueling into car tanks. The fuel vapor contains benzene and a large amount of olefins and aromatic compounds. Many substances like butadiene, benzene derivatives, and polycyclic aromatic hydrocarbons are harmful to human health. Moreover, when fuel vapor mixes with air, it forms a combustible mixture that can easily ignite or explode upon contact with fire. Following the completion of fuel vapor recovery改造, the concentration of "fuel vapor" inside gas stations will significantly decrease, greatly benefiting the air quality around the station. The operational efficiency of the gas station will also be effectively improved.

"Releasing oil and gas emissions into the air is not only pollution but also a waste of resources. Statistics show that at least 7 cubic meters of oil and gas are emitted from the refining plant to the retail gas station for one ton of gasoline, with concentrations ranging from 1 to 3 kilograms per cubic meter. After the gas station completes the retrofitting of oil vapor recovery systems, 95% of the gasoline vapor emitted during the unloading process of oil tankers can be recovered, as well as 90% of the gasoline vapor emitted during the refueling process."