Gore stands in front of a graph showing the ups and downs of carbon dioxide over the centuries. It was once thought that such things went in cycles. Cores of polar ice show that carbon dioxide is much, much higher than ever before in a quarter of a million years. There are changes in the Gulf Stream and the jet stream. Hurricane Katrina passed over Florida, doubled back over the Gulf, picked up strength from unusually warm Gulf waters, and went from Category 3 to Category 5. Japan and the Pacific are setting records for typhoons.

Last year South America experienced its first hurricane. He provides statistics: The 10 warmest years in history were in the last 14 years. Then he shows a series of later space photographs, clearly indicating that glaciers and lakes are shrinking, snows are melting, shorelines are retreating. He shows the famous photograph 'Earthrise,' taken from space by the first American astronauts. The documentary is based on a speech he has been developing for six years, and is supported by dramatic visuals. He stands on a stage before a vast screen, in front of an audience.

An inconvenient truth stream