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In the Understanding Global Change Framework, we can organize the parts of the Earth into three categories:  <b>HOW THE EARTH SYSTEM WORKS</b>—ongoing processes that shape Earth through time; CAUSES OF GLOBAL CHANGE—human activities and non-human factors that affect the Earth system processes; and MEASURABLE CHANGES IN THE EARTH SYSTEM—the evidence for global changes through time. Non-human CAUSES OF CHANGE tend to operate over long timescales (thousands to millions of years), while humans are causing major disruptions to the Earth system we can measure over relatively short timescales (decades, years, or less).
Originally uploaded in CLEAN:Teaching Climate and Energy:Tools for Educators:Understanding Global Change.

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Andrew Haveles, University of Wisconsin-River Falls
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