What's Happening to Our Climate: Natural Factors Cannot Explain the Recent Warming
http://www.climatecommunication.org/climate/natural-factors/

Aspen Global Change Insitution, Climate Conncection

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This classroom resource is a combination of 3 visualizations and accompanying text that illustrate how 3 key natural phenomena - cyclical changes in solar energy output, major volcanic eruptions over the last century, and El Nino/Nina cycles - are insufficient to explain recent global warming.

Subject: Geoscience:Atmospheric Science:Climate Change:Natural causes, Anthropogenic causes, Geoscience:Atmospheric Science:Climate Change, Environmental Science:Global Change and Climate:Climate Change:Natural causes, Anthropogenic causes, Environmental Science:Global Change and Climate:Climate Change, Environmental Science:Global Change and Climate
Grade Level: High School (9-12), College Lower (13-14)
Theme: Teach the Earth:Incorporating Societal Issues:Climate Change, Teach the Earth:Course Topics:Atmospheric Science, Environmental Science, Teach the Earth:Enhancing your Teaching:NGSS