Many people are allergic to airborne pollutants such as pollen.

许多人对空气中花粉之类的污染物质过敏。

《柯林斯英汉双解大词典》

However, there are many airborne pollutants inside the building, some are from the humans body, such as the droplets expelled through breathing, coughing and sneezing.

然而室内存在着多种随空气传播的污染，其中人体通过呼气、咳嗽和打喷嚏排出的含病原体的液滴，是呼吸道传染病传播的重要媒体，并会跟随气流运动和扩散。

youdao

"There is emerging evidence that a whole host of new environmental chemicals, many of them routinely found in pregnant women and children - such as Bisphenol A, flame retardants,pesticides, phthialates,and airborne pollutants."

VOA: standard.2010.08.09

The latter include health-damaging and smog-forming airborne pollutants like hydrocarbons, nitrogen oxide, particulate matter, carbon monoxide and formaldehyde, as well as greenhouse gases that contribute to climate change, like carbon dioxide, nitrous oxide, methane and other compounds.

FORBES: The 'Greenest' (And Meanest) Cars For 2013