Emma wrote on Nov 27
th, 2011 at 8:42pm:
[quote I would love to be convinced that I am.
'What's an unnatural helium nucleus compared to a natural one?
or - do you prefer natural poisons to unnatural ones?' - Muso
You're ASKING me??
Well it's smacking OBVIOUS.!!!!!
AND your comparison proves the point. You compare an unnatural 'helium nucleus" which ... not being a scientist, I don't see the relevance here, .....to an 'unnatural poison' !!!

.... and ask would I prefer a 'natural'...?
Call me simple, but obviously, we'd all be better off WITHOUT the UNNATURAL.

Heard of critical mass? Well you may not ever live to witness that tipping point, OR , it may well have already happened, !! but gone virtually unnoticed, except for a few people who are unable to beat off the public view, despite being able to PROVE the danger.
Well. You're oversimplifying the issue. - Muso
I 'm in agreement with you there.!!
BUT - where is the error in my logic???

[/quote]
Well a helium nucleus is a Helium nucleus regardless of the source. Alpha particles originating from Radon gas in a natural environment are the same as any other alpha particles.
People have lived in these parts of the world for many years with no appreciable effect. However a lower exposure of exactly the same radiation can have greater effects if it's perceived to be a problem. In other words if well meaning activists come up with the shock horror factor.
People can die from cancer as a result of worry. It's a real effect. A person's attitude has an enormous effect on his or her health.
Let's take a hypothetical experiment. If you were to tell the population of a city, say Stockton NSW that they had been exposed to deadly hexavalent chromium, you would expect a certain amount of anxiety - and anxiety is not without consequence.
Now can you see what I'm getting at?
There are two components involved in the total risk. Peter Sandman calls them hazard and outrage. The outrage part is the psychological part.
http://www.psandman.com/