Question

why don't we use wood as a fuel​

Answer 1

Answer:

Wood has less energy per kilo than coal, and a lower density than coal, so it takes much more room to transport. It makes some sense if youhave waste wood you can use locally- particularly if you can use a combined heat and power approach.

Answer 2

Answer:

 Answer: Because they produce more smoke or carbon dioxide which is a major source of air pollution and global warming.