The related studies are ongoing on this subject Gasification and other adv thermal conversion processes are increased where power generation in practical the solid fuel produced. The study covers those main areas: the core solid waste fuel handling and separation $($i$)$ gasification technologies solid waste $(0$ syngas clean$-$up and. $($v$)$ conversion of syngas to electric power with BTE technologies. Which of the following expressions are completed with the parts left blank in the paragraph above $?$ a $-$ Natural Gas b $-$ Wind to Energy c $-$ Biomass to Energy d $-$ Coal to Energy e $-$ Gas to Energy $1$