Green stuff, brown stuff: Secrets to a great compost pile

In this episode of Science Friday, host Ira Flatow explores the science and practice of composting with Cassandra Marcheto, author of 'Compost After Reading: A Practical Manifesto for Purposeful Decomposition.' The conversation demystifies composting by breaking down the essential balance of 'green' (nitrogen-rich) and 'brown' (carbon-rich) materials, emphasizing that successful composting is about creating an ideal environment for microbes and fungi to thrive. Marcheto dispels common myths, such as the need for expensive gadgets or perfect conditions, and encourages beginners to start small—using found materials like chicken wire or wooden pallets—while avoiding plastic, meat, and dairy in areas with wildlife. She highlights that composting can be done year-round, even in winter, and that the finished product, when properly managed, is a rich, earthy material that revitalizes soil. The episode also touches on municipal composting programs and the broader environmental impact of composting at both individual and community levels. Marcheto’s ultimate message: once you’ve read her book, compost it—literally—as a symbol of completing the cycle of purposeful decomposition.