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1: Active solar heating system 2: Soil 3: Feeder 4: Community 5: Carbon 6: Range 7: Fishery 8: Contamination 9: Lead 10: Water 11: Condition 12: Electricity 13: Change 14: Uptake 15: Conservation 16: Current 17: Hazard 18: Japan 19: Process 20: Atom (As of 19:49)
