State the disadvantages of burning wood as a fuel.

The disadvantages of burning wood as a fuel are: -

i. It releases unburnt carbon particles into the atmosphere. These fine particles are dangerous pollutants causing respiratory diseases like asthma.

ii. Incomplete combustion of it produces carbon monoxide gas. It is a very poisonous and suffocating gas.

iii. Burning of wood releases carbon dioxide into the environment. Increased concentration of carbon dioxide leads to global warming.