Category:Class M2

Ecumenopolis
Class M2, or Ecumenopolis planets are relatively large, about ten to fifteen thousand kilometers in diameter and are normally between three and ten billion years old. Class M2 planets originate from planets within a star systems ecosphere, frequently class M planets. Class M2 planets have atmospheres composed of nitrogen and oxygen; they have temperate climates and are almost always polluted beyond repair. The dominate features of Class M2 Planets are no longer natural, but artificial; one single huge city covers the entire planet. These worlds have very little, if any surface water. These worlds have very little animal life and almost no vegetation, but have huge Humanoid populations, normally numbering in the multiple hundreds of billions. M2 planets are considered to be ecological disasters.