2010 How Do We Know
Scientist David Crisp explains how NASA tracks regional carbon dioxide (CO2) emissions from space.
NASA scientist Ron Kwok details new technology he is using to monitor how extensively Arctic sea ice is melting from below, a key indicator of the ice's long-term stability.
NASA scientist Michael Watkins explains how satellites are used to monitor our changing global groundwater supplies.
Ocean salinity can have a big impact when it comes to changing climate. Learn how scientists are monitoring our salty seas.
Dr. Heidi Cullen talks to Dr. John Townshend about his current research which tracks rainforest deforestation.
The atmosphere isn't the only place carbon dioxide caused by human activity goes.
A warming planet could mean that sea levels rise three or more feet by the end of this century.
How do we know when a region may be experiencing an early drought? Dr. Heidi Cullen talks to NASA scientist Molly Brown, who relies on sophisticated satellites for the answer.