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 on the future. "Go Big or Go Home", which would ultimately appear as the seventh track on the final album, was released in May 2015 as a single, after the band's last single promoting "Oh, What a Life", "Luck", was released a year previously. "Pride" also appeared on a single in December 2015, and was also solicited as a promotional single to United States adult contemporary radio thereafter. "What We Live For" was officially unveiled by the band and Island Records on March 2, 2016, with pre-orders for both a digital download and compact disc version of the album being