In this video Paul Andersen explains how forests and rangelands are managed to provide renewable lumber and cattle. Threats to renewability of forests include old-growth logging, forest fires, and tree plantations. Threats to renewable...

The degradation of usable land into desert.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...

Highlighting the life and movement of freshwater rivers and streams. Animals and their aquatic interactions with the ecosystem. Why streams and rivers are important and should be protected.