About The Author

Diogo is a research scientist at the Universidade da Beira Interior, Department of Management and Economics.

Using Three Approaches To Determine Whether Renewable Energy Sources Have Replaced Fossil Fuel

The exploitation of wind and solar sources has transformed the electricity production systems, allowing for a diversified, endogenous, and green mix of electricity sources. It would be expected that the penetration of renewable electricity sources (RES), such as wind power, solar photovoltaic (PV), bioenergy, geothermal, and hydropower would substitute fossil fuel sources. In the meantime,