Atmosphere of Earth (see the temperature section, below). Because the general pattern of the temperature/altitude profile is constant and measurable by means of instrumented balloon soundings, the temperature behavior provides a useful metric to distinguish atmospheric layers. In this way, Earth's atmosphere can be divided (called atmospheric stratification) into five main layers. Excluding the exosphere, the atmosphere has four primary layers, which are the troposphere, stratosphere, mesosphere, and thermosphere. From highest to lowest, the five main layers are: The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at
Live Earth concert, Washington, D.C. Gore speak and Brooks play from what event organizers called a "JumboTron" outside the immediate viewing area. Due to last minute organizing, there were no working audio speakers that could project sound to the JumboTron viewers. Live Earth concert, Washington, D.C. The Live Earth concert in Washington, D.C., officially known as "Mother Earth", was held on the National Mall in Washington, D.C., United States and was sponsored by and held on the premises/venue of the Smithsonian's National Museum of the American Indian. It was only hours before the Washington D.C. concert was scheduled to begin that organizers were able to