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)

Current U.s. National Debt:

$36,167,124,467,492

Source