Although wood has a very high calorific value, we still discourage its use as a fuel. Explain.

This is because wood comes from the cutting of trees and forests, which affects the environment adversely. Cutting of trees results in an increase of CO2 Content in the air, as a result, global warming takes place. Also, burning of wood releases a lot of harmful gases, including carbon-di-oxide, carbon-monoxide and sulphur-di-oxides.