Topic: water purification

Melissa and Jam explore reverse osmosis through molecular motion, pressure and membrane separation. They also discuss limits and waste in water purification, questions about aluminium foil in dishwashers and sacrificial metals, and how mixtures of differently sized solid particles can separate through the Brazil-nut effect.

Julie Simpson explores the climate role of coastal saltwater wetlands, including marshes, mangroves and seagrass meadows. Alongside habitat, water purification and coastal protection, these ecosystems remove and retain substantial amounts of carbon dioxide. The episode examines how their ecological processes connect conservation with climate mitigation.