FAKE News is a term being kicked around in today's news...
This film is from 2015 and sheds serious light on how "fake" news is created.

Inspired by the acclaimed book by Naomi Oreskes and Erik Conway,MERCHANTS OF DOUBT takes audiences on a satirically comedic, yet illuminating ride into the heart of conjuring American spin. Filmmaker Robert Kenner lifts the curtain on a secretive group of highly charismatic, silver- tongued pundits-for-hire who present themselves in the media as scientific authorities –
yet have the contrary aim of spreading maximum confusion about well-studied public threats ranging from toxic chemicals to pharmaceuticals to climate change