The primary type of energy obtained from fossil fuels is thermal energy, which is often converted into mechanical energy for various applications. Fossil fuels, such as coal, oil, and natural gas, release energy when combusted, producing heat that can generate steam to drive turbines in power plants. This thermal energy is then transformed into electricity or used directly for heating and transportation. Despite their widespread use, reliance on fossil fuels also raises concerns about climate change and environmental degradation, highlighting the need for sustainable energy alternatives.