The vast majority of electricity produced is generated using "traditional" types of power plants. This term generally refers to mature power production technology that has a significant share of the global energy market. It includes any fossil fuel-based production (i.e. oil, gas and coal), nuclear plants and hydroelectric plants.
While undoubtedly there are strong trends towards greater use of emergent renewable energy sources, demand for traditional sources of power generation remains high.
Current wisdom regarding long-term energy supply points to renewables gaining share over time; however, the growth for this technology is not likely to sufficiently meet the growing demand for electricity globally. As a result, traditional approaches to power generation will continue to receive substantial investment and this segment of the market will remain the main source of energy for the foreseeable future.