Bioscience:The Biophysical Environment
The lithosphere， hydrosphere， biosphere and atmosphere are four interlocking pieces of the planet that together make life possible on earth. When they interact with each other and human activities， we get ecosystems. Ecosystems can be any size — from a spadeful of compost to a log， forest， or whole river system. People are also part of ecosystems. In this video program， we're going to look at three different types of ecosystems and see how different interactions work.
- Added：2006
- Country：Australia
- Duration：22
- Time of update：2011/8/17 14:56:55