Valmor is a Toxic world that the humans on this planet live in Bubble colonies, as they cannot survive the toxicity of the atmosphere. Its actually unknown why humans decided to colonize here. But the indigenous population welcomed them to the world and treated them as honored guest.
Geography
Its is 99% land, but its "water" is actually liquified toxins, the Valmorians are known to be hard workers and can breathe in almost any gas to survive. They when the humans arrived built the humans their bubble colonies and treated them as esteemed guest, and the colonies would only be built near a Valmorian city, so that the humans can interact with them.
Inside the bubble colonies is entirely terraformed to suite human species including their own farms and water supplies. The Valmorians purified their waters so they can drink.