Renewable energy, abbreviated as RE, is a source of energy that can be created or recreated more quickly than it is used.
Thus, solar energy is inexhaustible on the human time scale, as well as the energies derived from solar energy: wind energy, hydraulic energy (water cycle), biomass produced by photosynthesis and some marine energies.
This is also true for energy created by gravity (tidal energy) or internal geodynamics (geothermal energy).
On the other hand, sources of energy that are renewed at an infinitely slower rate than their consumption rate, such as petroleum, are not renewable.
As long as the sun exists, there will be wind, an inexhaustible source of energy. © Methos31, Wikimedia CC by-sa 3.0
Renewable energy - 1 Photo