style="font-size: 24px;"

<h1>Ende</h1>
<h3>Quellen</h3>

<table>

<tr><td><ul>
  <li class="image">500px: <a href="https://500px.com/photo/106595393">Jan Bambach</a><sup>‡</sup></li>
  <li class="image">YouTube: <a href="https://www.youtube.com/channel/UCwRH985XgMYXQ6NxXDo8npw">Kurzgesagt (de)</a> (<a href="https://youtu.be/wWSJYr1Lr0E">wWSJYr1Lr0E</a>)<sup>#$</sup></li>
  <li>Encyclopedia of Science: <a href="https://archive.fo/Q7Lq5">Kardashev civilzations</a><sup>✝$</sup></li>
</ul></td></tr>

<tr><td><ul>
  <li class="image">Unsplash: <a href="https://unsplash.com/photos/vCqclUnCg_8">Frank Denney</a><sup>§</sup></li>
  <li class="image">Wikimedia Commons: <a href="https://de.wikipedia.org/wiki/Datei:Geothermie_verfahren.png">Geothermie verfahren.png</a><sup>#§</sup>: <a href="https://de.wikipedia.org/wiki/user:Jkrieger">Jkrieger</a></li>
  <li>Wikipedia (de): <a href="https://archive.fo/ibom7">Geothermie</a><sup>✝‡</sup></li>
</ul></td></tr>

<tr><td><ul>
  <li class="image">Wikimedia Commons: <a href="https://commons.wikimedia.org/wiki/File:Biogas.jpg">Biogas.jpg</a>: <a href="https://commons.wikimedia.org/wiki/User:Asdrubal">Volker Thies</a><sup>‡</sup></li>
  <li class="imageplus">Neue Energien Forum Feldheim: <a href="https://archive.fo/mOdLO">Biogas</a><sup>✝#$</sup></li>
  <li>Gas-Magazin: <a href="https://archive.fo/gfwDi">Biogas: Vorteile und Nachteile im Überblick</a><sup>✝$</sup></li>
</ul></td></tr>

<tr><td><ul>
  <li class="image">Wikimedia Commons: <a href="https://commons.wikimedia.org/wiki/File:Barrage_de_la_rance.jpg">Barrage de la rance.jpg</a><sup>‡</sup>: <a href="https://commons.wikimedia.org/wiki/User:Oliver_H">Oliver H</a></li>
  <li>strom magazin: <a href="https://archive.fo/fQeZm">Gezeitenkraftwerk: Segen oder Fluch für die Umwelt?</a><sup>✝$</sup></li>
  <li>energie-strom.com: <a href="https://archive.fo/HHndJ">Gezeitenkraftwerk</a><sup>✝$</sup></li>
</ul></td></tr>

<tr><td><ul>
  <li class="image">YouTube: <a href="https://www.youtube.com/channel/UCwRH985XgMYXQ6NxXDo8npw">Kurzgesagt (de)</a> (<a href="https://youtu.be/wWSJYr1Lr0E">wWSJYr1Lr0E</a>)<sup>#$</sup></li>
  <li class="imageplus">YouTube: <a href="https://www.youtube.com/channel/UCsXVk37bltHxD1rDPwtNM8Q">Kurzgesagt (en)</a> (<a href="https://youtu.be/ulCdoCfw-bY">ulCdoCfw-bY</a>)<sup>#$</sup></li>
  <li>Gizmodo: <a href="https://archive.fo/ZdXcc">How to build a Dyson sphere in five (relatively) easy steps</a><sup>✝$</sup></li>
  <li>Daniel Tillet: <a href="https://web.archive.org/web/20170610111407/https://www.tillett.info/2016/08/03/carnot-efficient-dyson-spheres-are-undetectable-by-infrared-surveys/">Carnot Efficient Dyson Spheres are Undetectable by Infrared Surveys</a><sup>✝$</sup></li>
</ul></td></tr>

</table>

<!-- warning, ugly hack ahead: https://stackoverflow.com/a/5078297 -->
<ul class="footnote-legend">
   <li><sup>✝</sup> Archiviert vom Original</li><!--
--><li><sup>#</sup> Bild angepasst</li><!--
--><li><sup>‡</sup> <a href="https://creativecommons.org/licenses/by-sa/3.0/deed.en">CC-BY-SA 3.0</a></li><!--
--><li><sup>§</sup> Public Domain</li><!--
--><li><sup>$</sup> Zitat nach <a href="https://dejure.org/gesetze/UrhG/51.html">§ 51 UrhG</a></li>
</ul>

<div class="legend">
  <ul>
    <li class="imageplus">Inhalts- und Bildquelle</li>
    <li>Inhaltsquelle</li>
    <li class="image">Bildquelle</li>
  </ul>
</div>