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1: Alaska 2: Bird abatement 3: Soil 4: Maximum mid-expiratory flow rate 5: Range 6: Community 7: Periplaneta americana 8: Human 9: Weed 10: Feeder 11: Environment 12: Lactation 13: Fishery 14: Contamination 15: Plant 16: Function 17: Hydrocarbon Mixture 18: Japan 19: Climate Change 20: Process (As of 01:04)
Onroad mobile sources are vehicles found on roads and highways (e.g., cars, trucks, buses).
