The indoor level of radon isn't going to be lower than outdoors. Indoors is either the same or higher than outdoors. Your level of exposure to radon will not go up by going outside. That's your background exposure level, and is already baked into the calculation of how much an effect an elevated exposure to radon in your home will have on you. Radon is a serious thing to consider, especially if your home has a basement. Radon mitigation is not a scam conspiracy.
Like any good scam, they take a legitimate issue for few and sell it to many who don’t need it.
These websites will try to tell you that the average indoor radon level is equivalent to 2.5 cigarettes per day or 66 chest X-rays per year. The EPA doesn’t make that claim though.
