Carbon dioxide
<a href="//commons.wikimedia.org/wiki/User:Jacek_FH" title="User:Jacek FH">Jacek FH</a>
<span class="int-own-work" lang="en">Own work</span> based on <a href="//commons.wikimedia.org/wiki/File:Carbon-dioxide-3D-vdW.png" title="File:Carbon-dioxide-3D-vdW.png">Image:Carbon-dioxide-3D-vdW.png</a>