Smoking and vaping controls, the remains of the largest sea reptile, volcanic ash and jet engines and food production

Dr Chris Smith and the Naked Scientist team discover: Why we need stricter smoking and vaping controls and will they work? The remains of what’s believed to be the largest reptile to have roamed our Severn Seas. A tribute to the BA pilot who saved his air passengers from a volcanic ash cloud – so why are volcanoes so disastrous for jet engines? Finally, a look at how food production will cope with climate change in the future.