IMAGE CREDITS

# image 1
machvier - Online-Rechner - Jahresarbeitszahl von Wärmepumpenanlagen
Grafik: energieinstitut.at
https://www.klimaaktiv.at/service/tools/erneuerbare/machvier.html

# image 2
Energy Arc, central electrode of a Plasma Lamp
Author 	Blaise Frazier
January 2003
licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license
https://commons.wikimedia.org/wiki/File:Energy_Arc_(central_electrode_of_a_Plasma_Lamp).jpg

# image 3
Clausius dimostrazione assurdo
Author 	Tino 032
19 August 2009
the copyright holder of this work, release this work into the public domain
https://commons.wikimedia.org/wiki/File:Clausius_dimostrazione_assurdo.png

# image 4
Imagen termográfica de edificios en Vitoria-Gasteiz
Beato Tomás de Zumarraga
www.gasteizmografia.com
25 January 2013
Author 	Iker Gómez Iborra
licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. 
https://commons.wikimedia.org/wiki/File:L00_P_2101_92_c_beato_tomas_de_zumarraga_1.jpg