Industrial Air Pollution: The Hidden Threat in North China

Industries in North China are releasing harmful gases that are making air quality worse. These gases, called Volatile Organic Compounds (VOCs), are not just bad for the environment but also for human health. A recent study looked at 28 companies from 13 different industries to understand the impact of these emissions. The study found that some industries release more VOCs than others. Petrochemical and pharmaceutical industries are the biggest culprits. The types of VOCs released also vary. For example, surface coating industries release a lot of halogenated hydrocarbons, while petrochemical industries release more aromatics. These VOCs contribute to the formation of ozone and secondary organic aerosols, which can cause respiratory problems and other health issues. The study identified acrolein and acetaldehyde as priority hazards, especially in resin, plastic, pharmaceutical, and petroleum industries. The study also looked at the climate impact of these emissions. Freon-12 and Freon-11 from the petrochemical industry are major contributors to global warming. The study suggests that industry-specific strategies are needed to control these emissions effectively. The study highlights the need for better emission factors, reactivity-oriented controls, and multi-pollutant synergies in policy frameworks. This means that industries need to be more aware of the types and amounts of VOCs they are releasing and take steps to reduce their impact on air quality, health, and climate.