Reversing Anti-planet spy mission?

[Sockum]

In my current game, one of the computer-controlled TDM races sabotaged one of my planets with a successful spy/intelligence mission. I don't remember the exact description, but the message said something about a bomb was successfully exploded in atmosphere which lowered my planet's condition.

The planet condition went from Optimal to Deadly in a single turn. I promptly built a Climate Control facility to try and upgrade the planet condition, but after approximately 20 turns the condition is still Deadly.

Is there a way to reverse the effects of a spy mission like this? Or do I just need to live with it?

For what its worth, as far as I can tell the Deadly condition is having no effect on my planet -- the population isn't going down, the happiness rating is Jubilant, and the planet is happily producing just like it was before the conditions were altered.

Thanks in advance,

Sockum