Democratic (socialist/fascist) President Lyndon Johnson signs the Clean Air Act, requiring the states to develop and implement air pollution reduction strategies according to Federal targets.
[added 10/8/2022]
Subsequent Events:
Authority:
“Law of the Jungle”
ccc-2point0.com/preface
References:
Clean Air Act (United States) – Wikipedia
en.wikipedia.org/wiki/Clean_Air_Act_(United_States)