0 • A • B • C • D • E • F • G • H • I • J • K • L • M • N • O • P • Q • R • S • T • U • V • W • X • Y • Z
1: Active solar heating system 2: Soil 3: Feeder 4: Community 5: Carbon 6: Fishery 7: Range 8: Water 9: Contamination 10: Lead 11: Condition 12: Electricity 13: Uptake 14: Change 15: Conservation 16: Current 17: Hazard 18: Atom 19: Process 20: Japan (As of 22:36)