Compare LPG and wood as fuels.

Soln:

Wood

• It is considered as a traditional fuel used for both domestic and industrial purposes.
• Wood produces a lot of smoke which pollutes the atmosphere and causes respiratory diseases.
• The usage of wood to a large extent causes deforestation.
• The calorific value of wood ranges between 17000 and 22000 kJ/kg
• However, wood may be used as a furnace, stove or fireplace indoors while it is used for a campfire, furnace outdoors.

LPG

• The usage LPG (Liquefied petroleum gas) has replaced wood.
• It doesn’t release smoke and other pollutants.
• It is a cleaner fuel.
• The fuel efficiency of LPG is more than that of wood.
• The calorific value of LPG is 55000 kJ/kg.
• Hence, LPG is the most preferred choice.