Question

what is the difference between the burning of a candle and the burning of fuels like coal

Answer 1

Candle burns with a flame but coal does not burns with a flame also coal is a carbon product and its burning is harmful for environment but candle is made from wax its burning is not as much harmful as burning of coal .

Answer 2

Candle burns with flame but fuel like coal does not burns with a flame.

Candle is not much harmful as burning of fuel but burning of fuel is very harmful as it cause air pollution.

Candle produces less heat but any type of fuel produces much more heat.