This is the 3171st most frequent Dutch word.
fijnstof
Fine particulate matter or fine dust.
Here, 'fijnstof' refers to the general concept of fine particles, used appellatively to discuss its health impact.
Fijnstof is schadelijk voor de gezondheid.
Fine particles are harmful to health.
In this sentence, 'fijnstof' is used to specify the measured substance concerning air quality in urban environments.
In steden is de concentratie van fijnstof vaak hoger.
In cities, the concentration of fine particles is often higher.
Here, 'fijnstof' denotes the undesirable pollution particles, emphasizing the functionality of the air filter in mitigating them.