Question

why we should not use wood as a fuel/

Answer 1

There are many disadvantages of burning wood. Firstly, burning wood leads to air pollution especially if done indoors. This is dangerous for individuals in contact with the fumes and also for the environment in general. Also burning wood is advisable as compared to other fuels as the calorific value is very less. Therefore a larger amount of wood is burned to obtain the same amount of energy as compared to other fuels.