"Paul F" wrote in message
...
"Franz Heymann" wrote in message
...

And uranium is radioactive and hence carcinogenic :-)

As is tritium. Think of all those trutium-laden granite houses in
Cornwall. But it is also not polite to speak about that, for fear
of
upsetting the housing market.

Radon gas is the bigger problem here in Cornwall Franz. But we can
get our
houses tested for radioactivity free of charge.

My humble apologies. I boobed. I was intending to refer to the radon
problem. I don't know how the tritium slipped in.

Franz