I'm resurrecting this thread because I've just had a random thought about terraforming Venus and I don't want to spam people by creating a new thread.

Most biological/chemical process that are proposed would either not work or be extremely hard, seeing as the atmosphere of Venus is already in its most stable chemical configuration and will tend to go back to that if you make any changes.

So how about skipping chemical processes and going for nuclear ones. If atoms in the Venusian atmosphere were to capture neutrons and decay into other elements, the process would essentially be irreversible. Also, the compounds they currently form which are causing us problems (such as CO2) would be destroyed.

Of course, it depends what exact changes would take place to the atmosphere if it were saturated with neutrons, and it would require a powerful source of them.

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"I worry that, especially as the Millennium edges nearer, pseudo-science and superstition will seem year by year more tempting, the siren song of unreason more sonorous and attractive." - Carl Sagan, 1995