Producers, such as these trees in Borneo's thick tropical rain forest, use photosynthesis to convert solar energy (sunlight) and carbon dioxide into essential nutrients. Plants and other photosynthesizing organisms support the rest of the food web.

Photograph by James P. Blair, National Geographic
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Rainforest
Rainforest Encyclopedic Entry

Best For
6 - 12

Subjects
Biology, Geography

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A rain forest is an area of tall trees and a high amount of rainfall.

solar energy
solar energy Encyclopedic Entry

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6 - 12 and up

Subjects
Earth Science, Engineering

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  • Students

Solar energy is created by nuclear fusion that takes place in the sun. It is necessary for life on Earth, and can be harvested for human uses such as electricity.