Atmosphere of Earth relatively warm air above a colder one), and in others by a zone which is isothermal with height. Although variations do occur, the temperature usually declines with increasing altitude in the troposphere because the troposphere is mostly heated through energy transfer from the surface. Thus, the lowest part of the troposphere (i.e. Earth's surface) is typically the warmest section of the troposphere. This promotes vertical mixing (hence, the origin of its name in the Greek word τρόπος, "tropos", meaning "turn"). The troposphere contains roughly 80% of the mass of Earth's atmosphere. The troposphere is denser than all its overlying atmospheric
What We Live For and planned to release new music videos before their album was available in stores. American Authors Production Notes Citations What We Live For What We Live For is the second studio album by American pop rock band American Authors, produced by returning collaborators Aaron Accetta and Shep Goodman. Running at 42 minutes and comprising twelve tracks, the album was released worldwide by Island Records on July 1, 2016. The album marks the third major release by the band under the American Authors moniker, and largely continues the sound of their debut album, "Oh, What a Life". "What We Live For"