Why is everyone talking about regenerative farming, for starters. For fibre as well as food. #regenag is fashion's new favourite hashtag. What if we put back more than we took out? Stopped drenching the land with toxic chemicals? Worked in harmony with Nature? Could we feed and clothe the world if we produced less, and differently? Would we starve? Would prices skyrocket? How did we get to this place, where no one - not the land, not biodiversity, not the nutritional content of food, and not the farmers who are on the front lines - wins? Author and regenerative organic farmer Sarah Langford share her insider’s view.

When it comes to the fabrics we make our clothes from, there’s much confusion. Many of us don’t have a clue what textiles we’re buying and wearing; we’re not really teaching it in schools and brands don’t tend to talk too much about it, not least because so many of the textiles they use are unsustainable synthetics.

But materials matter, and they are all around us. Getting back in touch with them can be really satisfying. And when it comes to creating a more sustainable fashion industry, their impact is enormous, so what we choose whether as designers or consumers really makes a difference.

Why are animals so often left out of the conversation about sustainable and ethical fashion? We talk about people and planet, but less often about animals. My guest this week wants to change that. She challenges us to rethink the idea of animals as commodities - they are, she says, someone, not something.

She is Emma Hakansson, founder of founder of Collective Fashion Justice, an organization that puts animals as well as people and planet at the heart of an ethical fashion industry.

Robyn Lawley wants to talk about is spinach. In this candid interview, she tells her powerful personal story of overcoming some pretty scary health issues, and challenges us all to rethink our relationship with meat and dairy products. We're used to talking about vegan diets as planet-friendly and cruelty-free, but could their anti-inflammatory properties also help people heal from auto-immune conditions? While the studies are scant, and the official line remains that: in general, autoimmune disorders cannot be cured - what you eat obviously plays a role in the body's complex responses.

A vital convo with legendary Aussie Greenie, Bob Brown talking Tasmania’s old growth forests. In the Tarkine, towering eucalypts that have been standing for centuries are threatened with the chainsaw, thanks to government short-sightedness and corporate greed. The good news? Grassroots action is rising, as the numbers of tree-appreciating citizens swell, helped by a glowing new documentary, The Giants, by Rachel Antony and Laurence Billiet.

The film's subjects are indeed giants - not just Bob, but the towering Eucalyptus Regnens, Huon Pine and Myrtle Beech trees. As Bob said back in the 1980s when another pristine wilderness in his adopted state was under siege - destroying these natural wonders would be like scratching the face of the Mona Lisa.

Ten years ago, the devastating Rana Plaza collapse in Dhaka proved just how deadly the business of making clothes could be for marginalised garment workers. In countries like Bangladesh where cheap clothing is produced at high volume, and wages are kept low, it’s these workers - mostly young women - who face the greatest exploitation and vulnerability. Events commemorating the disaster’s anniversary went hard on the hashtag, #ranaplazaneveragain - but how much has really changed since 2013? Are factories everywhere safer? How about fairer? To what extent has fashion production really become more ethical?

Magic Mushrooms! Mycelium networks are working their wonders all around us. Together with bacteria, fungi break down organic matter - without fungi, nothing would decay. They help build soil and work in collaboration with plants and trees. We partner up with fungi to make bread and beer. We're even using fungi to make fashion. Meet brilliant botanist Merlin Sheldrake, author of Entangled Life.

Whether it’s the joy of dyeing cloth with pomegranates, the age-old practicality of turning sheep wool into felts and knits, or the rich legacy of complex embroideries and silk Ikat weaving, Central Asian textile traditions are bonded by cultural meaning and a respect for the natural world. And resources: nothing gets thrown away, as this week’s guest Aigerim Akenova explains through her love for patchwork - her nomadic ancestors' answer to upcycling.

What role could sustainable fashion play in growing newer, lower carbon industries here in line with SDGs? What do young urban Kazakhs and Central Asians in neighbouring countries want from the fashion today? As well as its craft heritage, Kazakhstan also has a vibrant modern fashion scene, its own fashion week, and (doesn’t everywhere?) fast fashion - so how can these two sides find balance in future?

How much do you know about the chemicals you're exposed to through every-day things like cosmetics, skincare, clothing, even food packaging, and food itself? How about what toxic chemicals might be contaminating air, soil and water from industrial processes? Organic beauty pioneer Andrea Rudolph talks about the hidden dangers of PFAS - forever chemicals, and shares her breast cancer story.