The Climate Time Machine See into the past and ahead to the future with the Climate Time Machine! How much Arctic sea ice has melted just since satellites started observing around 30 years ago? What parts of the world will be under water as sea level rises, inch by inch, foot by foot? How much has the greenhouse gas carbon dioxide increased in the air just in the last few years? How much has temperature risen around the world in just a little over 100 years?