Our environmental scientist Dr Cara Augustenborg has been encouraging us to be more mindful of our fragile environment for more than two years on our Down to Earth weekly feature.

You'd be forgiven for assuming that she's vegan, but she has resisted the change up to now.

However she's decided to take part in Veganuary, but with a scientific approach.

Take a listen to her explain her experiment to Ivan, and you can follow her vegan experiment here: https://www.facebook.com/CaraAugustenborgGreen/