Global warming: a perspective from earth history
A position paper of the Stratigraphy Commission of the Geological Society of London, published in The Guardian. By: Dr. Jan Zalasiewicz,Dr. Tiffany Barry, Dr. Angela Coe, Dr. David Cantrill, Professor Andy Gale, Dr. Philip Gibbard, Dr. John Gregory, Dr. Mick Oates, Professor Peter Rawson, Dr. Alan Smith.
The link address is: http://education.guardian.co.uk/higher/research/story/0,,1358602,00.html