http://www.unhcr.org/news/latest/2017/1/5874c2dd4/bottled-sand-builds-better-homes-sahrawi-refugees.html
https://twitter.com/Refugees/status/951768482927984640
origin - http://www.pipiscrew.com/2018/01/bottled-sand-builds-better-homes-for-sahrawi-refugees/ bottled-sand-builds-better-homes-for-sahrawi-refugees