Modifiers matching pollutant:

• potential,
• occupational,
• airborne,
• persistent,
• organic,
• clean,
• smaller,
• damaging,
• additional,
• particulate,
• coarse,
• harmful,
• gross,
• separate,
• indoor,
• dissolved,
• floating,
• lipophilic,
• up,
• agricultural,
• common,
• major,
• undesirable,
• urban,
• real,
• size,
• home,
• soluble,
• old,
• atmospheric,
• environmental,
• conventional,
• toxic,
• biodegradable,
• sized,
• large,
• outdoor,
• chemical,
• anthropogenic,
• solid,
• natural,
• hydrophobic,
• visible,
• dangerous,
• external,
• nutrient,
• typical,
• regulated,
• possible,
• hazardous,
• irritating,
• gaseous,
• harmless,
• specified,
• outside,
• inert,
• wet,
• estrogenic,
• primary,
• tiny,
• out,
• microscopic,
• fine,
• everyday,
• powdery,
• unwanted,
• insoluble,
• industrial,
• important,
• liquid,

Simple categories matching gaseous:

• fuel,
• anaesthetic,
• buffer,
• hydrocarbon,
• olefin,
• fluid,
• fumigant,
• object,
• substance,
• impurity,
• precursor,
• compound,
• anesthetic,
• agent,
• medium,
• alkyne,
• acid,
• mass,
• matter,
• constituent,
• phenomenon,
• material,
• contaminant,
• reactant,
• component,
• flow,
• molecule,
• pollutant,
• substrate,
• waste,
• odor,
• sulphide,
• oxide,
• contamination,
• monomer,
• cyanide,
• alkane,
• state,
• mixture,
• chemical,
• atmosphere,
• form,
• salt,
• carrier,
• body,
• plasma,
• system,