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As summer draws to a close this week on Sea Change Radio, we take a dip into the archives. First, we speak to Ian Power, an assistant professor at Trent University in Ontario, Canada, who is working on a breakthrough in manufacturing a CO2-absorbing mineral called magnesite in a fraction of the time that it forms in nature. We discuss his team’s research, learn about the methods they used, and talk about this unusual mineral’s potential to fight climate change. Then, we hear from Kendra Ulrich, a Senior Shipping Campaigner at Stand about the downsides of the cruise industry. Ulrich tells us about the hazards presented by enormous cruise ships that float into some of the planet’s most fragile ecosystems, the diesel fumes that harm the lungs of the ship’s crew and passengers, and the greenwashing that the cruise-lines have used in response to allegations of environmental irresponsibility.