Not sure if it is mentioned in the video you linked, but a Stanford team has been doing interesting research into this type of thing in recent years; https://n

Not sure if it is mentioned in the video you linked, but a Stanford team has been doing interesting research into this type of thing in recent years; https://news.stanford.edu/2017/09/04/sending-excess-heat-sky/ https://news.stanford.edu/2017/09/04/sending-excess-heat-sky... https://www.technologyreview.com/s/532826/material-cools-buildings-by-sending-heat-into-space/ https://www.technologyreview.com/s/532826/material-cools-bui... http://web.stanford.edu/group/fan/ http://web.stanford.edu/group/fan/