ɹˈeɪdiəm mˈeɪ ˈɔːlsoʊ biː ɹᵻlˈiːst ˌɪntʊ ðɪ ɛnvˈaɪɹənmənt baɪ hjˈuːmən æktˈɪvᵻɾi, fɔːɹ ɛɡzˈæmpəl, ɪn ɪmpɹˈɑːpɚli dɪskˈɑːɹdᵻd pɹˈɑːdʌkts pˈeɪntᵻd wɪð ɹˌeɪdɪoʊlˌuːmɪnˈɛsənt pˈeɪnt.
Radium may also be released into the environment by human activity, for example, in improperly discarded products painted with radioluminescent paint.