Why conventional energy sources is a fossil fuel?
Mankind has been burning fuels for centuries, wood was the first choice but then coal was found to be better, especially after many forests had been cut down. So the industrial revolution which started in the mid 1700’s naturally used coal as fuel for the first primitive steam engines. Later mineral oil and natural gas were discovered, and these also were used for industry and power stations as well as transport and domestic use. These all became so embedded in normal practice that we now call them conventional fuels, which is really just a convenient label to distinguish them from nuclear and renewable energy sources.
