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Climate Change: How Do We Know?

The Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 7,000 years ago marking the beginning of the modern climate era — and of human civilization. Most of these changes are attributed to very small changes in the Earth’s orbit changing the amount of solar energy the Earth receives.

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Date Of Record Release 2011-03-03 19:44:06
Description The Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 7,000 years ago marking the beginning of the modern climate era — and of human civilization. Most of these changes are attributed to very small changes in the Earth’s orbit changing the amount of solar energy the Earth receives.
Classification
Resource Type
Format
Subject
Source National Aeronautics and Space Administration (NASA)
Keyword Graph, Arctic, Sea ice, Carbon dioxide, Sea level, Global temperatures, Land ice
Selector Selection Committee
Date Of Record Creation 2011-03-03 19:07:19
Education Level
Date Last Modified 2011-03-03 20:37:52
Language English
Date Record Checked: 2011-03-03 00:00:00 (W3C-DTF)

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