What is the lowest part of the Earth's atmosphere, which may be 2 km high above the Earth's surface?
Tropospherics The Troposphere Troposhere Trophosphere Tropospheres Tropospherical Tropospheric Troposphere Epitroposphere Tropospherically
troposphere epitroposphere tropospherical tropospheric tropospheres trophosphere tropospherics troposhere tropospherically
troposphere
WikipediaEntity
Troposphere