Energiaallikate
Energiaallikate (Estonian for energy sources) are resources or natural phenomena from which energy can be obtained to power devices, generate electricity, heat buildings, or move vehicles. They can be broadly categorized by origin as primary energy sources and by the energy form after conversion as secondary energy sources.
Primary energy sources include fossil fuels (coal, oil, natural gas), nuclear energy, and renewable resources found
A common distinction is renewable versus non-renewable: renewable sources replenish naturally on human timescales (solar, wind,
The choice of energy sources is influenced by availability, geography, technology, cost, and environmental considerations, notably
Global energy systems are in transition toward low-carbon mixes, driven by policy, technology, and market dynamics.