Volatile organic compounds (VOCs) are key precursors of O 3 and secondary organic aerosols (SOAs) - a major component of fine particulate matter (PM 2.5).VOCs significantly contribute to the formation of photochemical smog, atmospheric oxidative capacity, visibility degradation, and global climate (Jenkin and Clemitshaw, 2000; Seinfeld and Pandis, 2006), and some VOCs are also known to be

VOCs come mainly from natural sources, like forest fires and the transformation of biogenic precursors; nevertheless, anthropogenic activities 

Conduct a walk-through around your entire home, and make a note of anything that could be a source of VOCs. Look for unused chemicals, in particular, such as a paints, solvents, adhesives, varnishes, and caulks. Even when stored, these products can cause VOCs to leak into your home's air.

One of the primary sources of VOCs is pesticides primarily used in our farms to control pests. After the pesticide gets exposed to the atmosphere, 

VOCs can be emitted from many everyday items. Here are some of the most common sources and what you can do about them: 1. Furniture. VOCs like formaldehyde can be ‘off-gassed’ by common items such as MDF furniture, and memory foam mattresses. They can also be found in some types of upholstered furniture and carpets.

Concentrations of 99 volatile organic compounds (VOCs) were continuously measured online at an urban site in Beijing, China, in January, April, July, and October 2016. Characterization and sources of VOCs and their related changes during days with heavy ozone (O 3 ) pollution were analysed.

The PMF model identified five dominant VOC sources, with highest contributions from diesel vehicular exhaust (34±5 %), followed by gasoline 

2022. 9. 7. · Biogenic volatile organic compounds (BVOCs) encompass VOCs emitted by plants, animals, or microorganisms, and while extremely diverse, are most commonly terpenoids, alcohols, and carbonyls (methane and carbon monoxide are generally not considered). Not counting methane, biological sources emit an estimated 760 teragrams of carbon per year in

The U.S. Department of Energy's Office of Scientific and Technical Information

Take a look at some of the unexpected sources of VOCs, and learn how you can manage these harmful airborne contaminants. Cleaning Supplies and Air Fresheners. When you use products containing VOCs (volatile organic compounds), these chemicals are released as gases into your home. Many household cleaning supplies and air fresheners are loaded

Many VOCs are relatively benign, and humans have evolved to coexist with them. Vegetation is a major source of isoprene, a terpenoid VOC that gets emitted naturally during the routine life cycles of tree species like eucalyptus and oak. Each year, 600 million metric tons of isoprene enter the air.