A blue lizard eats the red fruit of a tropical cactus in the Seaflower Biosphere Reserve, Colombia. In the early 1970s, the United Nations established a project called the Man and the Biosphere Programme, which promotes sustainable development. A network of biosphere reserves establish a working, balanced relationship between people and the natural world.

Photograph by Gabriela Dominguez, MyShot
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biosphere Encyclopedic Entry

Best For
5 - 12 and up

Earth science, Geography

Appropriate For

  • Educators
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  • Students

The biosphere is made up of the parts of Earth where life exists. The biosphere extends from the deepest root systems of trees to the dark environment of ocean trenches, to lush rain forests and high mountaintops.