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
Live Earth (2007 concert) the crowd "motherfuckers". The BBC later apologised for cutting away from footage of Metallica, and both during and after the concert for the bad language. On 12 April 2008, an Ofcom broadcast was shown on BBC1, apologising again for the 'offensive language.' Intelligent Giving have attempted to find out what was happening to the proceeds from ticket sales at the concerts. Their conclusions, published in a feature "What on (Live) Earth is going on?" were that no one involved is capable of giving a clear answer. Live Earth was documented on "Live Earth: The Concerts for a Climate in Crisis",