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1: Active solar heating system 2: Soil 3: Community 4: Feeder 5: Fishery 6: Carbon 7: Range 8: Lead 9: Contamination 10: Water 11: Change 12: Electricity 13: Japan 14: Uptake 15: Condition 16: Hazard 17: Current 18: Conservation 19: Process 20: Environment (As of 00:48)
Onroad mobile sources are vehicles found on roads and highways (e.g., cars, trucks, buses).
