Dr Peter Johnston (pictured) believes, beyond doubt, that a plant-based diet is personally beneficial and, in a broader sense, especially good for the planet.

Dr Johnston is an accredited practising dietitian, lifestyle medicine practitioner and wellness coach with a Masters in Nutrition and Dietetics and a PhD in Human Genetics.

You can learn more about Dr Johnston at the website "Perfect Human Food".

This episode of "Climate Conversations" gives you a chance to first, listen to Dr Johnston, and then, second, you can hear from U.S. cardiologist, Dr Kim Williams.

Beyond their common and passionate interest in a plant-based diet, both were at a sold-out "Dine with a Doc" event on January 13 at Melbourne's "Vegie Tribe" restaurant, Dr Johnston as a member of the advisory board with "Doctors for Nutrition" and Dr Williams as the guest speaker.

Besides listening to the audio on this episode, you can also hear Dr Williams on "The Proof" podcast talk about how "The Food We Eat Is Killing Us".

Dr Johnston is an enthusiast of Professor William E Rees and has urged anyone concerned about the world to consider what he says.