was it a movie or drama series?
It was a concert/documentary film.
An Inconvenient Truth
An Inconvenient Truth is a 2006 American concert/documentary film directed by Davis Guggenheim about former United States Vice President Al Gore's campaign to educate people about global warming. 
what does al gore author of an inconvenient It was his campaign to educate people about global warming.
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An Inconvenient Truth [SEP] Introduction
An Inconvenient Truth is a 2006 American concert/documentary film directed by Davis Guggenheim about former United States Vice President Al Gore's campaign to educate people about global warming. The film features a slide show that, by Gore's own estimate, he has presented over 1,000 times to audiences worldwide. The idea to document Gore's efforts came from producer Laurie David, who saw his presentation at a town hall meeting on global warming, which coincided with the opening of "The Day After Tomorrow". Laurie David was so inspired by his slide show that she, with producer Lawrence Bender, met with Guggenheim to adapt the presentation into a film.