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
Where We Are Where We Are Where We Are is the ninth studio album by Irish boy band Westlife. It was released on 27 November 2009 in Ireland and on 30 November 2009 in the UK through S Records, RCA Records and Sony Music. "Where We Are" is the group's first album following a break from music in 2008. This album was preceded by the lead single "What About Now" (a cover of the Daughtry song) and it was released on 23 October 2009 as a digital download a day later as a CD single. The group collaborated with numerous notable producers for