ET Contactee Says Moon Has Vegetation and an Atmosphere
Alex Collier, a self-described Ethical Extraterrestrial contactee suggests that the part of the Moon not visible to Earth is therefore with vegetation. Mr. Collier also indicates that the Moon contains water and an atmosphere.

Ingo Swann also supports Mr. Collier’s allegations. In his book,Penetration, Swann claims that he viewed various structures on the surface and observed extraterrestrials near them who were able to breath unaided, thereby suggesting an atmosphere on the moon.
Source