Fuels

Wood

"...The use of wood as a fuel source for heating is much older than civilization and is assumed to have been used by Neanderthals. Today, burning of wood is the largest use of energy derived from a solid fuel biomass...."           Experiments with fire wood

Fuels for burners used for microscale experiments are solid (candle burner) , liquid (ampoule burner) or gaseous (micro- burner).