Muckrakers
Journalist, magazine articles, etc,
A muckraker
A journalist who take something and make a problem out of it, or make it worse then what it really is
In magazines and books
You see a lot of muckraking in magazines or books. for example: McClure's magazine took on corporate monopolies and caused commotion in factories that where unsafe, and some that had child labor
The Jungle
Upton Sinclair published a book expressing meat in factories and how nasty and unsure what's in the meat
Tenements
Journalists, who where higher class, went to the rundown. low class society and wrote how people lived in nasty, and packed apartments called tenements