Currently, the world’s energy supply primarily comes from what source?

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BlackTom AI · Accepted Answer

To begin, let's consider the overall global energy mix and how each option fits into current reality.
Option A: Solar and wind power. While these sources have grown rapidly and are central to the transition to cleaner energy, they do not currently comprise the majority of the world’s energy supply due to intermittency, the need for storage, and the still-large share of demand met by other fuels.
Option B: Nuclear power. Nuclear provides a significant portion of low-carbon electricity in several countries, but globally it accounts for a minority of total energy supply because it faces high costs, long construction times, and public/policy challenges, limiting its share relative to fossil fuels.
Option C: Fossil fuels. This category includes coal, oil, and natural gas and remains the dominant source of energy globally for electricity, heating, and transportation. The vast infrastructure, established supply chains, and energy density of fossil fuels contribute to their continued prominence, despite climate concerns and ongoing decarbonization efforts.
Option D: Hydropower. Hydroelectricity is a major renewable source in some regions and contributes a sizable portion of electricity, yet its global share is still not enough to surpass fossil fuels due to geographic limits, environmental considerations, and variability in rainfall and river flow.
Option E: Biofuels. Biofuels are important for certain transport sectors and as a renewable option, but they represent a relatively small fraction of total energy supply globally because of land-use constraints, efficiency concerns, and competition with food production in some regions.
In summary, each option has a distinct role in the energy landscape, but when considering the total world energy supply across all sectors (electricity, heating, transport), fossil fuels remain the largest single source due to scale, infrastructure, and energy density advantages, even as renewables and other sources grow.

GEO_011_001_25S Exam 3

Currently, the world’s energy supply primarily comes from what source?

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