TED-ED: Nature's smallest factory: The Calvin cycle - Cathy Symington

The video explains how energy from food is derived from plants through photosynthesis, which consists of two main steps: energy storage in ATP and the Calvin cycle. The Calvin cycle is a sustainable process that converts CO2 into sugar using a series of molecular transformations and recycling. This cycle is efficient due to its ability to reuse materials, creating a continuous production line that supports life by converting sunlight and carbon into energy.

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