TROPOSPHERE is validvalid

a region of the atmosphere from 25,000 feet to 55,000 feet, the boundary between the upper troposphere and the lower stratosphere

162,491 of 196,601 in NWL2023·also valid in CSW24

a region of the atmosphere from 25,000 feet to 55,000 feet, the boundary between the upper troposphere and the lower stratosphere

256,032 of 280,887 in CSW24·also valid in NWL2023

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