Canada has the world's largest deposit of natural bitumen in the Athabasca oil sands, and Canadian First Nations along the Athabasca River had long used it to waterproof their canoes.
kˈænədə hɐz ðə wˈɜːldz lˈɑːɹdʒɪst dᵻpˈɑːzɪt ʌv nˈætʃɚɹəl bɪtˈuːmɛn ɪnðɪ ˈæθɐbˌæskə ˈɔɪl sˈændz, ænd kɐnˈeɪdiən fˈɜːst nˈeɪʃənz ɐlˈɔŋ ðɪ ˈæθɐbˌæskɚ ɹˈɪvɚ hæd lˈɔŋ jˈuːzd ɪt tə wˈɔːɾɚpɹˌuːf ðɛɹ kənˈuːz.