FYI, an EPA anti-radon scarecrow has a letter about the Basin MT radon mine printed in the current issue of NG (sorry, I don't have a copy of the text in electronic form).
This makes for an interesting comparison with NG's earlier article, "Nuclear Waste - Seeking Solutions" NG July 2002, following which NO letters pointing out the various errors & misconceptions in it were published.
From: Jim Muckerheide
Sent: Monday, January 12, 2004 1:13 PM
Subject: News report on the National Geographic Basin MT "USA Zip" article
See the following news item in the Helena (MT) Independent Record,
Friday Jan 9, reporting on the National Geographic "USA Zip" feature on
Basin Montana and the radon mines. It adds to the content about the
radon mines, and highlights the author's "field notes" about becoming "a believer."
Regards, Jim Muckerheide
Mining for Miracles
National Geographic 2004 jan, page 118 - 122
Images and more text are available at http://magma.nationalgeographic.com/ngm/0401/feature7/index.html