Molecules with two oxygen atoms

Usage examples of dioxides.

It was simpler (and cheaper) to seal each city inside the long glass-and-steel worms the inhabitants called the tubes so that the factories could belch their sulfur dioxides and ozones and chemicals into the sky without harming the human population.

Looking at the endless fields of golden wheat, the clear blue skies, it was difficult to imagine what this land must once have been like, choking under a permanent pall of dioxides and particulates.

They are sulfuric acid, the result of combining sulfur dioxides and water.

Now Europa possessed a thin but serviceable - though not to human beings - atmosphere of water vapour, hydrogen sulphide, carbon and sulphur dioxides, nitrogen, and miscellaneous rare gases.