It's not enough. There are not enough olivine rock deposits. It also attacks CO2 only, skipping methane and freon. Simple back of the envelope math ruins this

It's not enough. There are not enough olivine rock deposits. It also attacks CO2 only, skipping methane and freon. Simple back of the envelope math ruins this alleged plan. It can be a part of the big effort, but alone it won't do nearly anywhere enough. Plus the problem is, the deposits are not in the places that emit GHG. You need to put them where they can be most effective. That's not free. And then you have to get the world to not pump yet more GHG into atmosphere.