Climate change: How do we know?

This static graph of changes in CO2 concentrations goes back 400,000 years, showing the dramatic spike in recent years.

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NASA Jet Propulsion Laboratory

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Teaching Tips

Teaching Tips

Visualization could be used as an motivational introduction to the main cause of climate change, namely CO2 emissions.

Other versions of this exist, but this high quality graphic has "added value" with additional information on the evidence for human impacts and sources to relevant data.

This graphic/image could also be used to discuss the importance of time series data and the nature of science.

With a focus on the evidence that human activities are the reason for the recent increase in CO2, the webpage also includes summaries of the evidence and observations of recent change, plus links to the sources of the information.