From the archives.

Our guest this week will be Jo Clay, environmentalist, author and project developer who has extensively explored ways to reduce her carbon impacts, including through looking at what she and her family eat. This is sure to be a fascinating conversation - who isn't interested in food and reducing climate impacts? And Jo may challenge many of our closely held assumptions!

Food generates a lot of carbon dioxide and equivalent emissions. There's the agricultural impact to grow it (think fertiliser, feed and farting cows). Then there's transport, processing, packaging, disposal and food waste. What we eat matters. But which area has the biggest impact? What's the best way to cut back?

In The Carbon Diet, Jo Clay tries to cut her carbon footprint by 75%, testing out a different method each week. She uses carbon accounting to get her results and compares the changes against her lifestyle and that of the 'average' Australian. Jo road tested several ways to cut her food carbon footprint, including intermittent fasting, veganism, vegetarianism, food packaging, food miles, reducing food waste and making simple swaps at the supermarket.