Global warming is not happening

In the enclosed video, John Coleman, founder of the Weather Channel, describes the succession of events that led to the alarmist campaign about alleged global warming.
The theory developed due to the research of an eminent scientist named Roger Revelle and was promoted by his student in Harvard: Through books and conferences Al Gore managed to promote the theory. In his later years Revelle maintained that there was no certainty that global warming was true, but Al Gore said that Revelle was senile.
John Coleman explains why he does not consider that this theory should be accepted and expresses that he is skeptical about it.

https://www.youtube.com/watch?v=SyUDGfCNC-k