Yeah sorry my sleeping through Gen Chem all those years ago really showed in that comment. I did however do some research and CO2 seems useful for storing energy, so that is interesting in it's own right, especially given the amounts of sunlight and wind present on that planet. [1]

I also want to backtrack on the "the planet is almost certainly devoid of lifeforms" comment, as it seems there has been speculation that the clouds of Venus do host life. [2]

[1] http://arpa-e.energy.gov/?q=slick-sheet-project/electrochemi... [2] http://en.wikipedia.org/wiki/Atmosphere_of_Venus#Possibility...