The least expensive and most readily available non-renewable energy resource is typically coal.
Coal has been a primary energy source for many countries for decades. Its abundance, particularly in regions with rich coal deposits, makes it easily accessible and affordable for energy production. The extraction process, while environmentally controversial, is often cheaper compared to other fossil fuels like oil and natural gas. Additionally, coal-fired power plants are widespread, contributing to its availability in many markets.
However, it’s important to consider that while coal may be less expensive and readily available now, it poses significant environmental challenges, including greenhouse gas emissions and air pollution. As the world increasingly focuses on sustainable energy solutions, the role of coal as a predominant energy source is being re-evaluated.