ðə ɹˈeɪdɑːn kæn ˈɛntɚ ðɪ ˈɛɹ ænd ðˈɛn biː ɐ sˈoːɹs ʌv ɛkspˈoʊʒɚ tə ðə hjˈuːmənz, ɔːɹ ðə wˈɔːɾɚ kæn biː kənsˈuːmd baɪ hjˈuːmənz wˌɪtʃ ɪz ɐ dˈɪfɹənt ɛkspˈoʊʒɚ ɹˈaʊt.
The radon can enter the air and then be a source of exposure to the humans, or the water can be consumed by humans which is a different exposure route.