This episode of the Physics World Weekly podcast is part of our participation in the Covering Climate Now initiative.

In the host’s chair is our environment and energy editor Liz Kalaugher, who is in conversation with John Cook of George Mason University in the US. They chat about his work on consensus in climate science and why he needed to prove that climate change is real.

Next up is  Daniela Schmidt of the University of Bristol, who explains to reporter James Dacey how climate change is disrupting food chains in the oceans.

Finally, Iain Dale-Trotter reviews Robert Macfarlane’s latest book Underland: a Deep Time Journey, which looks at the long and complicated relationships that humans have with underground environments.