Complex sentence: Easier transport, establishment of ice rinks, a warmer climate and other factors have in general resulted in the demise of the Curling House and due to their generally small size, most have been allowed to become ruinous or have been demolished.
Split into simpler sentences: Easier transport, establishment of ice rinks, a warmer climate and other factors have in general resulted in the demise of the Curling House. Due to their generally small size, most have been allowed to become ruins or have been demolished.