"NASA, the agency known for exploring space, will be spending a lot more time studying Earth in the next few years.
The Obama administration has proposed a budget for NASA that includes billions of dollars for satellites and other tools to help scientists investigate Earth-bound problems, especially climate change.
That represents a major turnaround for NASA's Earth Science Division, which had been allowed to languish during much of the 1990s.
Back then, the division had so little money it wasn't able to replace aging satellites that monitor things such as polar ice, coastal wetlands, ocean temperatures and chemicals in the atmosphere."
Jon Hamilton reports for NPR's Morning Edition April 5, 2010.