These materials are used in innumerable applications, and billions of kilograms of these materials are made and used each year.
ðiːz mətˈɪɹiəlz ɑːɹ jˈuːzd ɪn ɪnˈuːmɚɹəbəl ˌæplɪkˈeɪʃənz, ænd bˈɪliənz ʌv kˈɪləɡɹˌæmz ʌv ðiːz mətˈɪɹiəlz ɑːɹ mˌeɪd ænd jˈuːzd ˈiːtʃ jˈɪɹ.