The span of long term climate cycles.

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Chapter 7, Problem 12QAP

To determine

The span of long term climate cycles.

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(A) We know that Earth's climate has changed throughout its history, What is one concern with the current warming trend? Explain. (2-4 sentences) (B) Scientists want to know whether the current warming trend is being driven by natural forces or human activities. If human activities, then we can do something about it. Their models suggest which group of factor-natural or anthropogenic-is most likely responsible for the current warming trend? Explain with reference to the figure below. (2-4 sentences) (C) Earth's climate has already warmed approximately 1°C over the past century and is predicted to warm another 1-4° C over the next century. List and discuss one potential impact/implication of this continued warming. (2-4 sentences) Obsenvations All factors Arthropogenic facors -Natural factors 08 04 02 -02 1850 1900 1950 200 Year Qlobal temperature change ("C)

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