Atmosphere of Earth sublimated into polar-mesospheric noctilucent clouds. These are the highest clouds in the atmosphere and may be visible to the naked eye if sunlight reflects off them about an hour or two after sunset or a similar length of time before sunrise. They are most readily visible when the Sun is around 4 to 16 degrees below the horizon. Lightning-induced discharges known as transient luminous events (TLEs) occasionally form in the mesosphere above tropospheric thunderclouds. The mesosphere is also the layer where most meteors burn up upon atmospheric entrance. It is too high above Earth to be accessible to jet-powered aircraft
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",