3.7.10. Impact of new coal combustion technologies on types and character of ash and slag

The necessity of cutting CO₂ emissions into the atmosphere is strongly impacting development and use of various energy sources, and is becoming a strategy for existence for practically all countries around the world. Coal, until now the cheapest source of thermal and electric energy, but also the most CO₂ emitting, requires improvements to existing combustion technologies and development of new ones.