Modifiers matching halocarbon:

• anthropogenic,
• small,
• aliphatic,
• inert,

Simple categories matching anthropogenic:

• substrate,
• disturbance,
• cause,
• activity,
• phenomenon,
• surface,
• corridor,
• chemical,
• substance,
• change,
• practice,
• contaminant,
• halocarbon,
• influence,
• sound,
• perturbation,
• intervention,
• material,
• metal,
• process,
• disaster,
• compound,
• event,
• entity,
• pollutant,
• interference,
• feature,
• structure,
• threat,
• source,
• modification,
• gas,
• action,