The volus homeworld is a high-pressure, high-gravity planet that supports an ammonia-based ecology. This rare environment means that the volus have been slow to colonize, as there are few planets that meet their habitation requirements. Most prefer to stay on Irune, working remotely via the extranet. The more adventurous don the clumsy but vital pressure suits and venture out to worlds in Citadel space to make their fortunes.
The Combine saw the potential of the planet as a factory world once they conquered it. during the occupation, the Combine forced the remaining volus to work in it's newly constructed factories that started to cover the planet. These factories used the resources from Dekuuna. the planet's liberation was surprisingly non-destructive, leaving many of the Combine's factories intacted, thus, giving the Citadel Alliance to use them for their war efforts.