write a justification summary to replace firewood with used cooking as a boiler fuel for tobbaco curing in Zimbabwe. $($include intext citations and a reference page$).$ the justification should include

a$.$ amount of cooking oil from hotels such as rainbow group, crown plaza, fast food such as chicken inn and chicken slice outlets etc$($the amount of forest conserved should be icluded$)$ tabulate the amount of cooking oil and how it can replace firewood

b$.$ the caloric value and the chemical processes that should be done to improve combustion of used cooking oil.

c$.$ Data on how it helps the farmer to reduce costs.