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World of Change

“Earth is constantly changing. Some changes are a natural part of the climate system, such as the seasonal expansion and contraction of the Arctic sea ice pack. The responsibility for other changes, such as the Antarctic ozone hole, falls squarely on humanitys shoulders. NASA’s Our World of Change series documents how our planets land, oceans, atmosphere, and Sun are changing over time.”

 

 

 

 

Updated September 2016

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