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1: Active solar heating system 2: Soil 3: Feeder 4: Community 5: Carbon 6: Fishery 7: Range 8: Contamination 9: Water 10: Lead 11: Condition 12: Uptake 13: Conservation 14: Electricity 15: Current 16: Change 17: Atom 18: Japan 19: Hazard 20: Process (As of 20:47)
