It's time for planetary-scale interventions to combat climate change -- and environmentalist Tim Flannery thinks seaweed can help. In a bold talk, he shares the epic carbon-capturing potential of seaweed, explaining how oceangoing seaweed farms created on a massive scale could trap all the carbon we emit into the atmosphere. Learn more about this potentially planet-saving solution -- and the work that's still needed to get there.

Can seaweed help curb global warming?

Seaweed, often overlooked, could become a major force in combating climate change by capturing carbon far faster than forests. Cultivating seaweed across just 9 percent of the world’s oceans could draw down over 50 gigatons of greenhouse gases annually. Beyond storing carbon, large-scale seaweed farms could feed billions and help deacidify oceans. The challenge lies in scaling this solution safely and investing in a future where the oceans help restore planetary balance.