  The community commonly assumes that the Venusian atmosphere lacks organic
(reduced) carbon. This is reflected in the literature, which now for almost a
half a century does not mention organic carbon in connection with the Venus
atmosphere. This assumption persists despite the failure of models that exclude
organic carbon to account for many well-established observed features of the
Venusian atmosphere. Here is presented a model summarizing reactions that
almost certainly are occurring in the Venusian atmosphere. The model relies on
reactions of reduced carbon compounds known to occur in concentrated sulfuric
acid (CSA), under high pressure and high temperature, many used in industrial
processes. Inclusion of this known chemistry into a model for the Venus
atmosphere accounts for several as yet unexplained observations. These include
the upper haze, the lower haze, and the "mysterious" UV-blue absorber. This
article also suggests, as a historical perspective, that a long-forgotten
dispute is responsible for the persistent assumption of absence of interesting
organic chemistry in the clouds of Venus.
