Just did a half hour of googling and I'm now thinking we can produce our own water and oxygen in situ on venus. I was a flunky in Chemistry so shoot me down if need be. Seems oxygen can be extracted from CO2 by electrolysis. And sulphuric acid (H2SO4) reacts with
five metals (sodium, potassium, lead, iron and zinc) producing hydrogen gas. Finally, the oxygen and hydrogen gases can be converted to water by burning. Need power source.