Al Gore’s inspiration with this issue came from his college years with Roger Revelle, a climate expert in Harvard University, from his sister’s death due to lung cancer, and his son’s near fatal car accident.
Throughout the movie, Al Gore discusses the scientific opinion on climate change, as well as the present and future effects of global warming and stresses that climate change "is really not a political issue, so much as a moral one", describing the consequences he believes global climate change will produce if the amount of human-generated greenhouse gases is not significantly reduced in the very near future. He also presents Antarctic ice coring data showing CO2 levels higher now than in the past 650,000 years.
The film also includes Al Gore proving that global warming is not insignificant. He tells the audiences the possibility of the collapse of a major ice sheet in Greenland and in West Antarctica that could lead in the raise of the global sea level by approximately 20 feet. It can result to flooding coastal areas and producing 100 million refugees. Melt water from Greenland, because of its lower salinity, could then halt the currents that keep Northern Europe warm and quickly trigger dramatic local cooling there. It also contains various short animated projections of what could happen to different animals more vulnerable to climate change.
The documentary ends with Al Gore arguing that if appropriate actions are taken soon, the effects of global warming can be successfully reversed by releasing less CO2 and planting more vegetation to...