How it Works


Stopping carbon emissions isn’t enough. We also need to scrub existing pre-industrial Co2..

How it works

Sargassum grows at sea.

Sargassum fluitans and natans are two species of floating seaweed that take up carbon through photosynthesis, just like plants on land. Climate change has created a unique situation where floating Sargassum has escaped the Sargasso Sea and become an invasive seaweed in the Tropical Atlantic. Simultaneously, climate change has caused a shift in wind patterns, so nutrient upwelling from deep waters is happening in the Tropical Atlantic, causing blooms of Sargassum as much as 8,000km long. In 2018 alone this equated to more than 20 million tonnes of invasive Sargassum in the Great Atlantic Sargassum belt.

Arresting the decay.

This Sargassum either sinks at sea or washes up onto the Caribbean coast, destroying valuable coastal habitats such as coral reefs, seagrass meadows and mangroves, before it is stranded on the beaches. Here it decomposes, creating a toxic, tourist-repelling smell and releases all its carbon back to the atmosphere. Carbon accounts for around 10% of the mass of wet Sargassum. Therefore, by harvesting and sinking Sargassum we can directly lock away the carbon contained in it for at least 700-1000 years.

Closing the loop.

In addition, we will partner with and supply industries creating products such as biofuels, fertilizers, concrete, biostimulants, or bioplastics from raw Sargassum. This has a double positive effect: on one hand we stop the harmful gases from being released back to the atmosphere; and on the other hand we avoid the release of the CO2 that would have been emitted if those products were created from fossil fuels. Initially we will collect Sargassum from beaches or close to the coast across the Caribbean. That is until we develop our prototypes for collecting, sustainably managing and processing Sargassum off-shore via ocean-combine-harvesters.