In order to increase efficiency and reduce CO2 emissions and other emissions, clear coal technologies are receiving major attention. What are these ?

(i) Advanced pulverised and pressurised pulverised fuel combustion.
(ii) Atmospheric fluidised bed combustion and pressurised fluidised bed combustion.
(iii) Supercritical boilers.
(iv) Integrated gasification combined cycle systems.
(v) Advanced integrated gasification, including fuel cell systems.
(vi) Magneto hydrodynamic electricity generation.