In this episode of Earthlings 2.0, we speak with Michael Kelland, CEO and Co-Founder of Planetary Technologies, about whether the ocean could play a much larger role in helping remove carbon dioxide from the atmosphere. For decades, the ocean has served as one of Earth’s largest carbon sinks, absorbing roughly a quarter of human-generated CO2 emissions. But that service comes at a cost: ocean acidification, which threatens coral reefs, shellfish, and marine ecosystems worldwide. Michael explains how Planetary Technologies is using a climate solution known as coastal seawater restoration, also called ocean alkalinity enhancement, to restore ocean chemistry, increase the ocean’s natural ability to absorb carbon dioxide, and provide long-term carbon removal. The conversation explores how ocean carbon removal works, the science behind ocean alkalinity enhancement, the challenges of measuring and verifying carbon removal, and what it will take to scale climate technologies that can help the world reach net-zero emissions.