Sequestering All That CO2 ... In Macroalgae - CleanTechnica

The article discusses the urgent need to not only transition to renewable energy and electric vehicles but also actively remove the excess CO2 already in the atmosphere to prevent catastrophic climate change. Hans-Josef Fell, former German parliament member and energy expert, highlights research compiled by the Energy Watch Group showing that floating macroalgae (seaweed) farms in subtropical ocean gyres could sequester vast amounts of carbon dioxide within decades. These seaweed farms grow rapidly when nourished by nutrient-rich deep water, offering a promising natural carbon sink that could help bring atmospheric CO2 levels below critical planetary limits. Beyond carbon removal, the biomass from these large-scale seaweed farms could replace fossil fuels and fossil-based raw materials, while also enhancing global food security and creating sustainable marine economies—especially benefiting countries in the Global South. While the concept of ocean farming for carbon sequestration is compelling, the article acknowledges the complexity and challenges of safely and effectively implementing such solutions at scale. It encourages further exploration of the Energy Watch