9. References
The pictures were taken from these websites
• http://www.geledes.org.br/images/stories/miojo/obama_yes
_we_can.jpg
http://daltonbuilthomes.com/Portals/142266/images/recycle
-symbol.jpg
http://files.moin-energie.webnode.com/200000259-
6c3fe6d396/regenerative-energie.jpg
Germany & Romania