pollutants / hide unblock visible sound
protective_filtration_mask is protective_mask. visible_light is non_ionizing_radiation. unblocking_traffic is performing. reflectivity is visible_feature. find_underwater is pollutants. blocked_sunlight has powerful_effect_on_microclimate darkness_visible is oxymoron. pollutant is tangible_thing. find_outside is noise_pollution. noise is unwelcome_sound.