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
What We Live For Better" and "Pride". Principal recording commenced in early to mid 2015, and was primarily recorded with producers Aaron Accetta and Shep Goodman, who had previously worked with the band on their eponymous extended play and "Oh, What a Life". While the band had an extensive set of songs at the beginning of the sessions, enough to create an album outright, the band exercised their material and continued to write and record new songs well into 2016. "What We Live For" largely continues the sound of the band's debut studio album, "Oh, What a Life". Lead singer Zac Barnett stated that