What part of the atmosphere does the lapse rate not change or stay the same?

Troposphere
air—commonly referred to as the normal, or environmental, lapse rate—is highly variable, being affected by radiation, convection, and condensation; it averages about 6.5 °C per kilometre (18.8 °F per mile) in the lower atmosphere (troposphere).

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Earths place in space 

1. antarctica2. saudi arabia