Every autumn, green chlorophyll fades from the leaves of deciduous trees, revealing the underlying reds, oranges, and yellows. But why does the chlorophyll fade in the first place? Recycling! MinuteEarth explains.

Watch this next: How do trees survive winter? Plus a tip from MinuteEarth:

Want to learn more about the topic in this week’s video? Here are some keywords to get your googling started: Leaf senescence, chlorophyll, carotenoid, anthocyanin.

Also: Watch and do this excellent Leaf Color Chromatography Experiment.

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