ˈæftɚ ðə wˈɔːɹ, ɐn ˈɪŋkɹiːs ɪn ˈɔɪl ænd nˈætʃɚɹəl ɡˈæs pɹədˈʌkʃən kˈɔːzd ɐ dᵻklˈaɪn ɪn kˈoʊl pɹədˈʌkʃən, ænd ðə lˈæst mˈaɪn ɪn lˈɛθbɹɪdʒ klˈoʊzd ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti sˈɛvən.
After the war, an increase in oil and natural gas production caused a decline in coal production, and the last mine in Lethbridge closed in 1957.