Was an interesting article on BC news last night Some scientist has found that **** from iron ore extraction actually absorbs carbon dioxide. It doesn't do it in heaps on the ground so there needs to be some sort of process created But they showed it in operation in a simple bottle. The put some teaspoons of the **** in, filled the bottle with Co2 and screwed on the cap. The bottle was pulled inwards as the gas was absorbed after a shake. Seeing as the **** is produced at a fairly consistent rate and is literally dumped into piles it a really good solution if someone can just upscale it to a cheap industrial process.