A series of concerts "bigger than Live Aid" is being planned for July, in a bid to put the subject of climate change before an audience of a global audience of 2bn.

The event, scheduled for July 7, will feature co-ordinated film, music and television events in seven cities including London, Washington DC, Shanghai, Rio de Janeiro, Cape Town and Kyoto, with major broadcasters and media owners aiming to extend the reach of public awareness of global warming.