It's Us

This video segment from 'Earth: The Operators' Manual' explores how we know that today's increased levels of CO2 are caused by humans burning fossil fuels and not by some natural process, such as volcanic out-gassing. Climate scientist Richard Alley provides a detailed step-by-step explanation that examines the physics and chemistry of different "flavors" or isotopes of carbon in Earth's atmosphere.

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Geoff Haines-Stiles Productions
EARTH
The Operators' Manual

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Teaching Tips

Teaching Tips

Use to start a discussion or unit on the misconception that volcanoes emit more CO2 into the atmosphere than human activities. Additional resources from this program are available here: http://earththeoperatorsmanual.com/ If needed, students can review fossil fuel formation in segment 3 of this same set of resources.

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