Arch Bridge

This video segment adapted from Building Big illustrates the strength of the arch in bridge design and construction.

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Avalanche Town

The impact of natural disasters is made vivid in this video segment adapted from NOVA. A small town in Iceland, prepared for recurrent avalanches, is devastated when one takes a new and damaging path.

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Build a Bridge

Survey potential bridge sites, research bridge design, and select the right bridge for the right location in this interactive activity from the NOVA Web site.

Building the Channel Tunnel

How do you build a tunnel 32 miles long -- under water? This video segment adapted from Building Big, follows the construction of the Channel Tunnel (nicknamed "Chunnel"), the engineering wonder that connects England to France.

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Citigroup Skyscraper Design Problem

This video segment adapted from Building Big looks at the challenges faced by structural engineer William LeMessurier in designing a new skyscraper and how he very closely averted disaster.

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Clean Water Systems in Mexico

The push to modernize Mexico's water and sanitation systems not only saved human lives, it also spurred economic growth, as illustrated in this video segment adapted from Rx for Survival.

Clifton Suspension Bridge

This video segment from Building Big illustrates the basic design principles of the Clifton Suspension Bridge in Bristol, England.

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Deforestation in Bolivia

This visualization adapted from NASA features two satellite images from 1984 and 2000 that show the dramatic deforestation of the Bolivian rainforest.

Demolition Woman

Find out how controlled explosions are used to demolish multi-story buildings in this interview from the NOVA Web site.

The Disappearing Aral Sea

This visualization adapted from NASA features satellite images showing how more than 60 percent of the Aral Sea has disappeared during the last 30 years.

Elements of Steel

This resource from the AMERICAN EXPERIENCE Web site, which contains both an interactive activity and illustrated text, looks at the composition of different types of steel and their impact on technology.

Energy Sources

This video segment produced for Teachers' Domain illustrates a variety of energy sources used to generate electricity, some of which are in use and some of which are under exploration.

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Kerri-Ann Richard

In this video from Science City, Kerri-Ann Richard, an environmental engineer, describes how she became interested in the field and why it is important to clean up the environment by removing contaminants from soil and ground water.

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Fire Safety in High Rises

This video segment adapted from NOVA explains how the sprinkler revolutionized fire safety and also features developments in fire-safety design for high-rise buildings.

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Firth of Forth Cantilever Bridge

This video segment from Building Big: "Bridges" demonstrates the basic design of a cantilever bridge by looking at Scotland's Firth of Forth Railway Bridge.

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Geodesic Dome

This video segment adapted from Building Big highlights the evolution of the geodesic dome, designed by legendary architect and inventor, Buckminster Fuller.

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Geospatial Revolution

Learn how satellite imagery, social networking sites, mapping technologies, and volunteers worked together to address human needs following an earthquake in Haiti, in this video segment from Geospatial Revolution, produced by Penn State Public Broadcasting.

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Global Trends Quiz

In this interactive quiz from NOVA, take the Environmental Challenge and test your knowledge of human impact on the world's natural resources and climate.

Global Warming: Beyond Fossil Fuels

Martin Hoffert, professor of physics at New York University, discusses global warming and alternative energies in this interview from the NOVA/FRONTLINE Web site.

Global Warming: The Developing World

This video segment adapted from NOVA/FRONTLINE looks at the future of global warming as developing nations, including India and China, increase their need for energy.

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