Also consider industrial carbon capture. It would be costly, but it seems it would easier to capture carbon emissions at the primary coal burning sites than with distributed burners. We still should be looking at non-coal, renewable options and I'm glad we are, but we still have a lot of milage with "cleaner" fossil-fuel based approaches. This IPCC Report[0] suggests 80%+ CO2 sequestration rates extrapolated from known technologies (built on smaller scales).

[0] https://web.archive.org/web/20100210022620/http://www1.ipcc....