They could have been a movie showing them building greenhouses.
The trailers turned me off because the premise seemed to be that all of a sudden we have to find a new home. We already know today that we have to do that. Sure, it’s a long way off, but the Sun’s going to burn up the Earth, so we have to find another place. Or is there some immediate threat? And at the stage of development we have today, we haven’t got the means to “find another home.”
Maybe I’m missing something, but the science seems wrong.