I came across many ways of, how can CO2 be removed from the atmosphere. Most of them were traditional ways like planting trees and letting Earth's Cycle remove the CO2 itself. But these traditional ways can take a long time to clear out the extra CO2 from the atmosphere that has been produced over the years. Also, I came across this study about Artificial Trees. I don't know how fast they are but I think they are faster than the traditional methods. So is there any other studies conducted on how to remove CO2 by technological means? And how fast and cost-effective they are?

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