Final answer:
Fossil fuels currently provide over 80% of the world's energy, including petroleum, coal, and natural gas. The transition toward renewable sources, including wind and solar, is ongoing but non-renewable sources dominate global energy production.
Step-by-step explanation:
Today, fossil fuels provide over 80% of the world's energy. This category includes petroleum, natural gas, and coal. Although the transition towards renewable energy sources like wind and solar is underway, driven by concerns over climate change and pollution, fossil fuels remain the predominant source of energy.
However, as of now, non-renewable sources, particularly fossil fuels, are the mainstay of global energy production. Nuclear energy also contributes a substantial fraction of electrical energy, having been a steady source since its rise from 1970 to 2000. With the current emphasis on reducing carbon emissions and reliance on fossil fuels, the role of nuclear, as well as hydroelectric power, in the future energy mix is a subject of both policy and scientific debate.