Answers

2015-06-11T16:55:07+05:30
Wood is inefficient and very costly. It wood take a lot of wood to run a car. Earlier, in the past, we used wood as a fuel, but after discovering that coal was more effective than wood, we started using coal as the main fuel, even though wood has a higher calorific value.

------------------------------------------------------------------------------------------------------------------
2 5 2
pls click thanks button above and mark as best since i answered first :-)