Energie: Verskil tussen weergawes

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k Wysigings deur Dfarin teruggerol na laaste weergawe deur CocuBot
Lyn 143:
*[http://www.physicsweb.org/article/world/15/7/2 What does energy really mean? Vanaf Physics World] {{en}}
*[http://www.renewableenergybenefits.com Renewable Energy Benefits] {{en}}
*[http://www.einfach-vergleichen.info Ökostromvergleich] {{de}}
 
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