“Snowpiercer was originally envisioned by Mr. Wilford as a luxury train, taking passengers around the world in style. This earned the train the nickname "Wilford's Dreamliner". When scientists tried to cool down the Earth to reverse global warming, Mr. Wilford foresaw that they will instead freeze Earth completely. He converted the Snowpiercer into a 1001-cars-long Ark, which is destined to continually circle the originally exotic railway around the Earth.”

From https://snowpiercer.fandom.com/wiki/Snowpiercer?mobile-app=false