[carvink]

Some of that work about possible solutions has been done by Paul Hawken. His Project Drawdown book is at least an organized and reasoned list of 100 possibilities. I attended a talk about one of them - marine permaculture arrays. This is a body of working knowledge developed over the past thirteen years, with new inventions being developed and deployed for growing kelp in the open ocean. What's proven is the ability of wave, solar, wind powered pumps to upwell cold water hundred of meters beneath the ocean surface, and irrigate kelp, doubling the growth rate. This is important because 93% of global warming goes into the surface layers of the ocean, cutting of circulation of nutrients needed by life.

What's proven is that seaweeds and kelps can sequester more carbon per square meter per year than the tropical rainforest. The idea is put submerged, autonomous satellite-assisted kelp platforms in the open ocean at scale, to farm for food/feed/fertilizer/fish or just sink the kelp into the depths to sequester the carbon for hundreds of years. (per UN research)

There is now a kelp coin, which might someday play a role in emerging carbon sequestration markets. At the moment, it is a fundraiser, crowd- funding style to help raise capital to get these to hectare scale. https://www.climatefoundation.org/kelp-coin.html This kelp coin is new, just a couple of weeks out.

It might take a decade or more to get to a gigaton of carbon sequestration. But it is also about food security and ecosystem regeneration. If you like short videos for information, try https://www.climatefoundation.org/2040-make-a-change.html