CO2 sequestration

CO2 sequestration. Some pilot plants and nothing more: the old absorption process with mono- or di-ethanol-ammine . But describing these systems is called “clean coal” or “zero emissions”.  Really what is the link between “CO2 sequestration” and “clean coal”?  Hence comes a question: not that the problem of global warming is used to divert attention from pollution by SOx, NOx, unburned hydrocarbons, heavy metals and particulate?  Are not they released by coal combustion if we capture CO2?