As the Gillard government's plan for a carbon prices sends Coalition stocks soaring, attention is increasingly focusing on what opposition leader Tony Abbott believes in about climate change and how to deal with it. Today in Crikey, Tony Abbott debates one of his most formidable opponents on the issue -- Tony Abbott.

Tony Abbott: Climate change is a relatively new political issue, but it's been happening since the earth's beginning. The extinction of the dinosaurs is thought to have been associated with climate change.