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the concentration of a chemical species, normally a pollutant, in air; usually measured at a specific height above the ground, saasteainete tavapärane sisaldus õhus
ground level concentration . Keemiaterminite baas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kem/ground%20level%20concentration/1/eng (07.08.2026)
