The Luna Disaster was the worst terraforming disaster during the colonisation of the inner planets. In 2088, several atmosphere processors malfunctioned, releasing unhealthy levels of toxic gases into the moon's partially created atmosphere. Terraforming workers, and early colonists were able to hide in an underground network of tunnels dug earlier to house pipes until the fallout had subsided. However a group of brave workers sacrificed their lives and mangaed to restart the atmosphere processors before official help arrived. The Luna Disaster pushed back Luna's terraforming completion over 2 years due to the amount of gases released into its newly formed and unstable atmosphere.