It's time for planetary-scale interventions to combat climate change, and environmentalist Tim Flannery thinks seaweed can help. In a bold TED 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. Watch this 14 minute talk on Youtube
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