Modifiers matching pollution:

• solid,
• hazardous,
• particulate,
• airborne,
• industrial,
• marine,
• ambient,
• local,
• atmospheric,
• adverse,
• up,
• urban,
• significant,
• environmental,

Simple categories matching airborne:

• bacteria,
• condition,
• particle,
• constituent,
• contaminant,
• fiber,
• substance,
• object,
• pm,
• microorganism,
• vehicle,
• matter,
• feeder,
• material,
• disease,
• prey,
• creature,
• component,
• waste,
• event,
• thing,
• particulate,
• system,
• pollutant,
• image,
• craft,
• item,
• allergen,
• medium,
• impurity,
• sensor,
• gas,
• virus,
• compound,
• abrasive,
• aerosol,
• device,
• chemical,
• contagion,
• unit,
• hydrocarbon,
• trauma,
• seed,
• conveyance,
• armament,
• organism,
• agent,
• toy,
• debris,
• hazard,
• contamination,
• vessel,
• insect,
• pest,
• aldehyde,
• illness,
• bug,
• pollution,
• dust,
• animal,
• germ,
• sound,
• infection,
• pathogen,
• metal,
• platform,
• predator,