sˈɛvɹəl ɛnvˌaɪɹənmˈɛntəl hˈæzɚdz, sˈʌtʃ ɐz æmˈoʊniəm ˌɛnˈeɪtʃ fˈoːɹ plˈʌs, hˈaɪdɹədʒən sˈʌlfaɪd ˈeɪtʃ tˈuː z, ænd ðə ɡɹˈiːnhaʊs ɡˈæs mˈɛθeɪn sˌiːˈeɪtʃ fˈoːɹ, mˈeɪ biː kənvˈɜːɾᵻd baɪ kˌiːmoʊlˈɪθoʊjˌuːɾətɹˌɑːfz ˌɪntʊ fˈɔːɹmz ðæt ɑːɹ lˈɛs ɛnvˌaɪɹənmˈɛntəli hˈɑːɹmfəl, sˈʌtʃ ɐz ˈɛn tˈuː, sˌoʊ fˈoːɹɾi tˈuː, ænd kˈoʊ tˈuː.
Several environmental hazards, such as ammonium (NH4+), hydrogen sulfide (H2S), and the greenhouse gas methane (CH4), may be converted by chemolithoautotrophs into forms that are less environmentally harmful, such as N2, SO42-, and CO2.