Answer:
The muckrakers were reform-minded journalists in the Progressive Era in the United States (1890s–1920s) who exposed established institutions and leaders as corrupt. ... The muckrakers played a highly visible role during the Progressive Era. Muckraking magazines—notably McClure's of the publisher S. S.
The Supreme Court Ruling was important as it decided that free speech could only be limited if it incited harm. Ohio's law saying that group could not gather to talk about criminal syndicalism broke the 1st amendment as it didnt incite harm
National Congress is the answer
In a population where theres less cleaning and more polution.