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1: Active solar heating system 2: Soil 3: Community 4: Feeder 5: Carbon 6: Lead 7: Condition 8: Atom 9: Current 10: Process 11: Contamination 12: Human 13: Fishery 14: Range 15: Environment 16: Water 17: Electricity 18: Conservation 19: Subdivision 20: Hazard (As of 14:45)
