04/04/1968
https://www.presidency.ucsb.edu...
"There is no excuse for a river flowing red with blood from slaughterhouses."
"Today, we proclaim our refusal to be strangled by the wastes of civilization."
"No one has a right to use America's rivers and America's waterways that belong to all the people as a sewer."
"But we must act, and act swiftly."