1971/4: Godzilla vs. Hedorah aka Godzilla vs the Smog Monster 1971

 Trailer:

Watch movie:

https://www.facebook.com/share/v/19gBrGGvvA/ 

https://en.wikipedia.org/wiki/Godzilla_vs._Hedorah 

https://www.moriareviews.com/sciencefiction/godzilla-vs-the-smog-monster-godzilla-vs-hedorah-1971.htm 

https://eofftvreview.wordpress.com/2019/06/01/gojira-tai-hedora-1971/ 

http://www.1000misspenthours.com/reviews/reviewse-g/godzillavsthesmogmonster.htm