One of the differences is that the carbon dioxide becomes part of an existing system (limestone, etc. - the carbon cycle) while sulfur and nitrogen oxides are not???
(sulfur and nitrogen oxides; are not; ) (One of the differences; is; that the carbon dioxide becomes part of an existing system) Context(One of the differences is,List([0, 25))):(the carbon dioxide; becomes; part of an existing system)
One of the differences is,List([0, 25))
sulfur and nitrogen oxides One of the differences the carbon dioxide
are not is becomes
that the carbon dioxide becomes part of an existing system
part of an existing system