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1: Soil 2: Community 3: Article 4: Range 5: Holistic environmental restoration 6: Human 7: Lactation 8: Periplaneta americana 9: Alaska 10: Bird abatement 11: Maximum mid-expiratory flow rate 12: Treatment 13: Ecosystem 14: Caterpillar 15: Environment 16: Plant 17: Japan 18: Water 19: Hydrocarbon Mixture 20: Process (As of 22:55)
A Particulate Matter is a tiny (microscopic) matter in the atmosphere. It might be solid or liquid.
