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1: Active solar heating system 2: Soil 3: Community 4: Feeder 5: Carbon 6: Range 7: Lead 8: Contamination 9: Water 10: Current 11: Atom 12: Condition 13: Fishery 14: Electricity 15: Conservation 16: Process 17: Human 18: Environment 19: Hazard 20: Japan (As of 12:06)
