Subject: Is breathing outdoor air containing radon gas any safer than it is indoors?

All of the information I can locate seems to ignore any potential danger 
associated with breathing radon comtaminated outdoor air. There is a 
wealth of information describing offices and homes that are potentially 
comtaminated with this gas. What is the reason for this? 
Also, is radon gas most hazardous when it settles on a dust particle that 
is inhaled into the lungs?  Thanks in advance for your information.

Re: Is breathing outdoor air containing radon gas any safer than it is indoors?