![](https://ideas.ted.com/wp-content/uploads/sites/3/2021/09/FINAL_Seaweed.jpg?w=770)
From solar panels to electric vehicles, all sorts of exciting technologies are being used to address the climate crisis. But some solutions already exist in the natural world. Seaweed — yes, seaweed — could help us absorb carbon emissions, generate marine protein and replace petroleum-based products.