How do we know the climate is changing? How do we know what's causing it? Some of the world's leading climate scientists explore the science behind the headlines in this lively documentary.
The inception of the "Keeling Curve," a history of atmospheric carbon dioxide levels, marked a key moment in American science history. The record began in March, 1958 at a small observatory on the top of Hawaii's Mauna Loa.
A documentary about volcanic eruptions, their causes and effects on Earth and the geological implications of those events in history and in the future - Part 2.
