All episodes

Light is all around us – from fireflies glowing in the garden to the screens in our pockets. In this illuminating episode of SUBSTANCE, host Joe Hanson explores how scientists are developing more sustainable ways to produce light and color, including bioluminescent glow sticks and next-generation display technologies.

Enzymes are among nature’s most powerful catalysts and are helping scientists and industry tackle some of the world’s biggest sustainability challenges. In this episode of SUBSTANCE, host Joe Hanson explores how enzymes are improving everyday household items such as detergents and how cutting-edge enzyme research could help address climate change.

Clay is one of the oldest materials humans have ever used, from early pottery to the walls of homes. In this episode, host Joe Hanson explores how this ancient material can inspire new solutions for an increasingly warming world.

Sulfur might evoke matches, volcanic gases, or that yellow rock from chemistry class – but it’s far more powerful than you probably think. In this episode of Substance, host Joe Hanson explores the surprising story of an element that has shaped human history for centuries and plays a crucial role in our modern life.

In this episode of SUBSTANCE, host Joe Hanson explores the unique capabilities of fibers like hemp or coconut and where they can be used sustainably: From the automotive industry to coastal protection.

Salt may be one of the most familiar substances in everyday life, but in this episode of SUBSTANCE, host Joe Hanson explores how a special class of salts could help decarbonize one of the most overlooked parts of the energy system: heat. With the help of experts Dr. Nils-Olof Born of BASF and Assistant Professor Silvia Trevisan of KTH Royal Institute of Technology in Stockholm, Joe Hanson looks at how so-called molten salts can store and deliver heat for industrial processes without relying on fossil fuels.

CO₂ is one of the gases most closely linked to global warming, but it is also deeply embedded in how modern industry and cities function. In this episode of SUBSTANCE, host Joe Hanson explores what it will take to reduce emissions in two places that matter enormously for the climate: industrial production and urban design

Fabrics and fashion are deeply tied to sustainability – not least because the scale of production and consumption means huge volumes end up as waste or pollution. This episode of SUBSTANCE asks what it would take to “close the loop” and move fabrics toward a circular economy. Host Joe Hanson draws on perspectives from both the Hong Kong–based nonprofit Redress and BASF in his exploration of why circularity is a useful way to turn intent into action; from designing for durability, repair and recyclability to building the systems needed for collection and sorting.

In this episode, our host Joe Hanson discusses a SUBSTANCE that is literally vital: water. Former NASA expert, now entrepreneur Diana Yousef and BASF scientist Ligia Azevedo make it clear in their stories, that the economical use of clean drinking water is essential for our survival and how new technologies can help us preserve it.

In this episode of SUBSTANCE, host Joe Hanson explores the surprising power of fungi with artist-turned-entrepreneur Phil Ross and BASF scientist Dr. Birgit Hoff. Far from being just mold or mushrooms, fungi are nature’s recyclers and bio factories, capable of producing antibiotics, vitamins, and even sustainable materials for fashion, packaging, and construction.