Bertie speaks to fashion journalist and sustainability consultant Lucianne Tonti about her new book Sundressed: Natural Fabrics and the Future of Clothing.

They discuss issues with sustainability indexes and modern fibres created from crude oil and trees, vs the benefits of clothes made from natural materials produced through regenerative agriculture.

Podcast editing by Vasko Kostovski.

Futher reading: 

• Buy Sundressed from Island Press.
• Read Lucianne's column in The Guardian.
• Preorder To Dye For from Penguin.
• 'There is so much to say about plastic pollution. Why are we not talking about it?' on Land and Climate Review.

Click here to read our investigation into the UK biomass supply chain, or watch a clip from the BBC Newsnight documentary.