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1: Active solar heating system 2: Soil 3: Community 4: Range 5: Bird abatement 6: Weed 7: Lead 8: Hazard 9: Feeder 10: Electricity 11: Contamination 12: Change 13: Fishery 14: Japan 15: Atmosphere 16: Development 17: Process 18: Carbon 19: Periplaneta americana 20: Action (As of 03:10)
