Atmosphere of Earth However, polar stratospheric or nacreous clouds are occasionally seen in the lower part of this layer of the atmosphere where the air is coldest. The stratosphere is the highest layer that can be accessed by jet-powered aircraft. The troposphere is the lowest layer of Earth's atmosphere. It extends from Earth's surface to an average height of about , although this altitude varies from about at the geographic poles to at the Equator, with some variation due to weather. The troposphere is bounded above by the tropopause, a boundary marked in most places by a temperature inversion (i.e. a layer of
Ozone, Tennessee Ozone, Tennessee Ozone is an unincorporated community in Cumberland County, Tennessee, United States. Ozone is the location of Ozone Falls State Natural Area, which was established in 1973 to protect Ozone Falls, a 110-foot (33 m) plunge waterfall, and its surrounding gorge. Ozone is located at (35.88194, -84.80917). The community is situated atop the Cumberland Plateau, roughly five miles west of the plateau's eastern escarpment at Walden Ridge and five miles east of the Crab Orchard Mountains. Fall Creek passes through the western part of Ozone before spilling over Ozone Falls and cutting a gorge that forms the community's southern