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
Live Earth (United Kingdom, Middle East) and the Star World Channel. MSN was "the exclusive global broadband partner for Live Earth India." The concert was cancelled shortly after the November 2008 Mumbai attacks on November 26, 2008. Wall, Gore, and Pachauri stated in a joint press release that, "due to circumstances far beyond our control, we are saddened to announce that "Live Earth India" has been cancelled. We will continue to work for solutions to the climate crisis for the good of the people of India and around the world. But for now, our thoughts and our prayers are with the victims