a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" /></a><br /><span>Energia renovable y no renovable</span> by <span>Silvia Escalante</span> is licensed under a <a>Creative Commons Reconocimiento-NoComercial-CompartirIgual 4.0 Internacional License</a>.