![]() In less productive locations, growing enough seaweed to reach climate targets would be even more challenging: three times as much space would have to be devoted to seaweed farming to sequester the same amount of carbon. The researchers performed more than 1,000 seaweed growth and harvest simulations for each of the seaweed types, which they said represented the “optimistic upper bounds” for seaweed production.įor example, the new estimates assumed that farming space could be found within the most productive waters for seaweed in the equatorial Pacific, around 200 nautical miles off the coast. The model considered things like the seaweed’s nitrate uptake (which is essential for growth), the water temperature, the sun’s intensity, and height of the sea’s waves, using global ocean data gathered from past years, while accounting for current farming practices. But as the technology approaches 100 efficiency, it gets more expensive and takes more energy to capture additional CO2. The idea is that it could be grown and then intentionally sunk to lock away that carbon long enough to ease the pressure on the climate.Īrzeno-Soltero and her colleagues at the University of California, Irvine, used a software model to estimate how much seaweed, of four different types, could be grown in oceans around the world. Carbon capture and storage (CCS) is a combination of technologies that capture CO 2 and then safely stored it underground in suitable geological formations. Ask MIT Climate How efficient is carbon capture and storage Most carbon capture technologies aim to stop at least 90 of the CO2 in smokestacks from reaching the atmosphere. ![]() Decarbonization of the power sector becomes the backbone that the decarbonization of the rest of the economy happens on, says John Northington, director of the National Carbon Capture Center, a research facility near Birmingham, Alabama. ![]() Seaweed pulls carbon dioxide from the atmosphere through photosynthesis, and then a significant amount is sequestered-potentially for millennia-when the plant matter eventually sinks down into the ocean depths. Capturing the CO 2 from power plants’ flue gas is where most of the action is. ![]()
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