I was hoping that this proposal would be a uniquely unilateral one. If a single state or province in the USA or Canada committed to this plan (and if it worked

I was hoping that this proposal would be a uniquely unilateral one. If a single state or province in the USA or Canada committed to this plan (and if it worked as well as I optimistically propose, and provided enough nutrients) then they could singlehandedly put away enough carbon to actually solve the problem.