This carbon calculator, developed by the EPA, guides students in calculating their carbon footprint and then using that information to make decisions about how to reduce their carbon emissions.

C-Learn is a simplified version of the C-ROADS simulator. Its primary purpose is to help users understand the long-term climate effects (CO2 concentrations, global temperature, sea level rise) of various customized actions to reduce fossil fuel CO2 emissions, reduce deforestation, and grow more trees. Students can ask multiple, customized what-if questions and understand why the system reacts as it does.

A sequence of five short animated videos that explain the properties of carbon in relationship to global warming, narrated by Robert Krulwich from NPR.

This click-through slideshow of solar technologies provides photos, illustrations, and text to describe eight passive and active solar technologies: thermal trough, mirrored dish, power tower, thin film, concentrated sunlight, solar paint, evacuated-tube collectors, and sun-grown biofuel.

This video reviews key points as well as pros and cons of nuclear power.

This video explains how geothermal energy can be harvested and used, particularly when the natural resource is in abundance. The video takes us to a geothermal system in Reykjavik, Iceland's capital, which heats the buildings of the entire city by pumping hot water from a geothermal well.

This short video touches briefly on the future of global energy and which energy sources best meet four energy-choice criteria: affordable, available, reliable, and clean.

This video stitches together nine separate videos about energy sources (hydro, coal, geothermal, nuclear, wind, biofuels, solar, natural gas, and oil) from the Switch Energy site. Videos can be viewed as a group, or separately, each under their own title.

This video is one of a series produced by the Switch Energy project. It highlights the use of biofuels as a renewable source of energy.

This video is one of a series produced by the Switch Energy project. It reviews the pros and cons of natural gas as a source of energy.

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