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1: Active solar heating system 2: Soil 3: Community 4: Feeder 5: Carbon 6: Lead 7: Atom 8: Contamination 9: Water 10: Current 11: Fishery 12: Condition 13: Range 14: Human 15: Process 16: Conservation 17: Environment 18: Electricity 19: Change 20: Plant (As of 11:46)
A 40-hex is the landscape description hexagon that is established on each of the grid points in the EMAP grid. Actual size of these hexagons is 634.5/16 = 39.7 km2.
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