Key figures: Al Gore (narrator/subject); Davis Guggenheim (director); Lawrence Bender, Scott Burns, Lesley Chilcott (producers); Tipper Gore (personal narrative contributor)
Summary
An Inconvenient Truth, a documentary film directed by Davis Guggenheim and featuring former U.S. Vice President Al Gore, was released theatrically on May 24, 2006 — first in New York and Los Angeles, then expanding nationwide through June 2006. The film presents Gore’s slide-show lecture on climate change and global warming, interweaving scientific data, graphs, and ice-core samples with Gore’s personal narrative about his decades of environmental advocacy.
The film blends Gore’s personal anecdotes, visual demonstrations (melting glaciers, rising sea levels, rising CO₂ concentration curves), and the scientific consensus on anthropogenic climate change. Over approximately 100 minutes, it builds the case that human activity — primarily the burning of fossil fuels and associated CO₂ emissions — is warming the planet and will produce catastrophic consequences if left unchecked: rising ocean levels, ecosystem collapse, intensified hurricanes, and humanitarian crises. The film’s release coincided with growing international awareness of climate science, approximately one year before the IPCC Fourth Assessment Report (2007) would declare the science of human-caused warming “unequivocal.”
An Inconvenient Truth brought these scientific conclusions into mainstream popular culture, becoming one of the most-discussed cultural events of 2006 and sparking both widespread acclaim and intense political criticism. It was released against the backdrop of then-record-high oil prices, the peak of the Iraq War, and a fiercely contested political climate in the 2006 U.S. midterm elections.
Production
From Slideshow to Documentary
The film grew out of Gore’s traveling climate science slideshow, which he had refined over approximately 30 years of presenting to audiences since the early 1970s. After his 2000 presidential election defeat, Gore intensified his lecturing schedule, delivering the presentation thousands of times worldwide. Producer Laurie David saw the slideshow at a Hollywood event in 2005 and, convinced it could reach a mass audience as a film, connected Gore with director Davis Guggenheim.
Guggenheim’s approach was deliberately intimate: rather than restructuring the lecture into a conventional documentary, he retained the slideshow format as the film’s spine, interspersing it with behind-the-scenes footage of Gore preparing for lectures, personal family reflections, and footage from Gore’s farm in Carthage, Tennessee. Filming took place over several months in 2005–2006, including shoots in Cannes, Tokyo, and various U.S. locations where Gore gave the presentation.
The film was produced under Paramount Classics (distribution) and Participant Media (production), the latter a socially-minded studio founded by Jeff Skoll. Production budget estimates placed the cost at a modest $1 million, which made the subsequent box office performance especially remarkable.
Scientific Basis and Key Claims
The film’s central visual icon is the Keeling Curve — the graph of rising atmospheric CO₂ concentration measured since 1958 at Mauna Loa, Hawaii, which Gore dramatically demonstrates using a mechanical lift to trace the exponential rise. Other key evidence sequences include:
- Ice-core data showing the correlation between CO₂ concentration and temperature over 650,000 years of Antarctic ice records
- Time-lapse glacier recession — photographic comparisons of glacier retreat at Mount Kilimanjaro, Glacier National Park, and the Himalayas spanning decades
- Sea level projections — Gore presented models showing that melting of the West Antarctic Ice Sheet or Greenland ice sheet could raise sea levels by up to 20 feet, flooding coastal cities including Miami, Shanghai, Calcutta, and lower Manhattan
- Hurricane intensity — citing recent research linking warming ocean surface temperatures to the intensification of tropical storms, presented in the aftermath of Hurricane Katrina (2005)
Some of these projections, particularly the 20-foot sea level rise figure, later drew scientific scrutiny as a worst-case scenario not fully supported by peer-reviewed consensus at the time.
Reception and Impact
Critical and Commercial Success
An Inconvenient Truth opened to strong critical reviews, earning an aggregate score of 93% on Rotten Tomatoes. Critics praised its clarity, urgency, and Gore’s charismatic on-screen presence — a quality many noted was absent during his 2000 presidential campaign.
Commercially, the film exceeded all expectations for a science documentary. Opening in limited release on just 4 screens, it grossed approximately $281,330 in its first weekend — an average near $70,000 per screen, among the highest per-screen averages for a documentary at that time. By the end of its theatrical run it had grossed approximately $24.1 million domestically and roughly $49 million worldwide — making it the third-highest-grossing documentary film in history as of 2006, trailing only Fahrenheit 9/11 (2004) and March of the Penguins (2005).
Academy Awards
The film won the Academy Award for Best Documentary Feature at the 79th Academy Awards (February 25, 2007). Guggenheim accepted the award. Additionally, Melissa Etheridge’s original song “I Need to Wake Up,” written for the film’s credits, won the Academy Award for Best Original Song at the same ceremony — one of the rare occasions when a documentary’s soundtrack composition won the songwriting Oscar. This double win amplified the film’s cultural visibility significantly.
Nobel Peace Prize
On October 12, 2007, Al Gore and the Intergovernmental Panel on Climate Change (IPCC) were jointly awarded the Nobel Peace Prize “for their efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change.” The Nobel Committee explicitly cited Gore’s An Inconvenient Truth as a key element of this contribution. The prize ceremony took place in Oslo on December 10, 2007.
Companion Materials
Alongside the film, Gore published a companion book (also titled An Inconvenient Truth, Rodale Books, May 2006) that expanded the scientific content and was designed for educational use. A sequel film, An Inconvenient Sequel: Truth to Power, was released in 2017, following up on the original’s claims a decade later.
Cultural and Political Significance
An Inconvenient Truth marked a watershed moment in climate change becoming a mainstream cultural issue. It became a cultural touchstone — screened in schools across dozens of countries, cited in policy discussions, and incorporated into curricula from secondary school through university. In the UK, the film was distributed to secondary schools by the government; in 2007, however, a British high court judge ruled that several of Gore’s claims constituted “errors” that misrepresented the scientific consensus in specific ways, leading to guidelines requiring “balance” when showing it in schools.
Simultaneously, the film became a flashpoint for criticism. Climate-change skeptics and conservative commentators contested Gore’s projections and political framing, characterizing it as partisan advocacy. Some scientists, while broadly affirming the film’s core message about warming, took issue with specific claims (the 20-foot sea level rise, the Hurricane Katrina attribution) as overstated or not fully supported by then-current literature.
The film’s enormous cultural footprint elevated Gore as the global face of climate activism and helped establish climate change as a defining issue for a generation — contributing to the political environment in the 2006 U.S. midterm elections in which energy policy and environment emerged as campaign issues.
Longevity and Legacy
The film’s influence extended far beyond 2006. Specific projections and timelines in An Inconvenient Truth became subjects of scientific refinement and critique over the following decade, as climate science advanced — but the film’s core thesis on anthropogenic warming was confirmed with growing certainty by subsequent IPCC reports (2007, 2014, 2021). The film is credited with changing public opinion on climate change in multiple surveys taken between 2006 and 2010 that showed increased concern after viewers watched it.
Significance
An Inconvenient Truth represents a pivotal moment in both environmental and cultural history. The year 2006 saw the climate crisis transition from a scientific-technical concern to a defining cultural and political issue for global mainstream audiences. The film’s commercial success and critical acclaim demonstrated that mass audiences would engage seriously with climate science presented through personal, humanized storytelling. It positioned climate activism as a central cultural concern of the 21st century and established a framework — both scientific and moral — through which climate change would be debated in public discourse.
The film is also significant as a work of documentary cinema that reshaped the genre’s commercial and cultural viability, proving that non-fiction films with serious subject matter could achieve broad popular reach and cultural impact comparable to major narrative features. It was released in the same year that oil prices reached historic records — together, these events signaled 2006 as the year energy and environmental risk entered the permanent foreground of political and economic life.