In last week's show on Earth Hour, we had a quick chat to Dr. Ben McNeil, a Senior Fellow at the Climate Change Research Centre in the University of New South Wales, about the current state of knowledge on climate change and some of the policies that Australia and the world could implement to tackle the problem. This week I am putting up the longer, more wide-ranging interview I had with Ben on all things climate change. Ben is a very impressive young scientist and one of Australia's renowned climate experts, so tune in to hear about the latest climate change science as well as the current thinking and policy development going into the issue.