"Tipping points to the post-carbon society" with Prof Doyne Farmer & Prof Cameron Hepburn

"Towards a low-carbon future" with Lord Nicholas Stern

"Environment, conflict and peacebuilding: a personal journey of change within the United Nations" with David Jensen

"Disruptive oil and electricity futures" with Amory Lovins

"Climate Violence?" with Prof Clionadh Raleigh

"The concept of time in biology, and the unity of life" with Prof Brian J. Enquist

"Rebel’s or farmer’s best friend? The Janus face of ‘blood diamonds’ and other conflict minerals" with Dr Anouk S. Rigterink

Natural flood management - what's the evidence?

"Climate change: what’s new, what’s next?" with Karen Florini

"Can future energy needs be met sustainably?" with Professor Sir Chris Llewellyn Smith

"Exploring our inner space: discovering the deep sea and assessing human impact" with Prof Alex Rogers

"The clean energy revolution: science and policy" with Prof Daniel Kammen

"A world powered by renewable energy" with Prof Nick Eyre & Prof Malcolm McCulloch

"How can we achieve a sustainable future for the global oceans?" with Prof Richard Bailey, Prof Catherine Redgwell & Prof Alex Rogers

"Save the planet: invest in fossil fuels?" with Prof Myles Allen