This Nature video segment focuses on the four foods most important to the grizzly bears' survival, and it describes the threats to the supply of each of them.

In this video segment from Nature, learn about the problems bears are creating on ranch land surrounding Yellowstone National Park.

This Nature video segment explores how the relationship between humans and grizzly bears has changed over the course of American History, and it describes the closing of the Yellowstone National Park garbage dumps in the 1970s.

Learn about the precautions humans must take in the face of a growing grizzly bear population in this video from Nature.

In this interactive activity from the American Museum of Natural History, play connect the dots and discover the connections between the people, animals, and plants in three habitats of the Dzanga-Sangha rain forest in the Central African Republic.

In this Nature video, learn about the extraordinary impact that birds have on the agriculture of a small Indian community.

This course provides a review of physical, chemical, ecological, and economic principles used to examine interactions between humans and the natural environment. Mass balance concepts are applied to ecology, chemical kinetics, hydrology, and transportation; energy balance concepts are applied to building design, ecology, and climate change; and economic and life cycle concepts are applied to resource evaluation and engineering design. Numerical models are used to integrate concepts and to assess environmental impacts of human activities. Problem sets involve development of MATLAB® models for particular engineering applications. Some experience with computer programming is helpful but not essential.

This video, edited from footage produced for Jean-Michel Cousteau: Ocean Adventures, the Ocean Adventures team explores the world of a species of turtle found in the Amazon Basin and how climate change can have devastating consequences for their survival.

In this video segment adapted from Spanner Films, learn how Alaska Native communities that rely on hunting and fishing are threatened by rising temperatures and melting permafrost.

Students are asked to explain how human actions have hurt the eagle and the sea turtles

This video segment adapted from the NOW-RAMP 2002 Expedition documents a research expedition to Pearl and Hermes Atoll in Hawai`i. Watch as biologists assess the bird and plant populations and then work to eradicate invasive species.

In this video from Outdoor Nevada, Brian Wignall speaks with an ornithologist about the peregrine falcon, a majestic and endangered species that is one of the fastest animals in the world.

In this video adapted from Texas Parks and Wildlife Department, learn about the prairie dog, the importance of its role in its ecosystem, and how it is affected by an ever-growing human population.

This clip asks students to respond to the question about what animals are to us and should human needs outweigh their need for habitat.

This article from Science a GoGo describes the risks that increasing noise pollution in ocean waters may pose to the creatures that live there. Once you read it, you'll never tap on a fish tank again!

In this What's Up in the Environment? video segment, an electrical engineer in Virginia and his 13-year-old son explain how they produce electricity in their home. 

This video adapted from the Arctic Athabaskan Council explains how warmer temperatures in the Arctic are transforming the ecosystem and threatening the subsistence culture of the Athabaskan people.

Examine how the human/grizzly relationship has changed since the closing of the Yellowstone dumps, and also learn about the challenges posed to both humans and bears, in this video segment from Nature.

In this video from Nature, learn more about the ongoing debate regarding whether or not the grizzly bear population needs special protection .