[OnyxCougar]

I agree with HP here.

Her problem:
She firmly believes that radiation is causing her backache and you to be infertile.

Your problem:
That's nonsense.

The compromise:
Find out what she wants.
In your diatribe, you failed to mention what it is she wants. You said what she thinks, you told us that she found some small body of "evidence" to support her position.

That's Fine.
So what does she want you to do?

You said you hardly spend time on the computer at home any more. So if that's true, why is her back hurting? You're too focused on the argument and being pissed rather than ask her:

"So what do you want me to do?"

That answer should tell you much about the underlying problem.