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Explained: Why do leaves change colours in the fall?

Canoe.ca

Two-year-old Carter O'Donoghue plays with leaves with his mother Jen Bernard during sunny 22C weather in this photo taken Friday, Sept. 27, 2013 at Nicholls Oval in Peterborough. (Clifford Skarstedt/QMI AGENCY)

Two-year-old Carter O'Donoghue plays with leaves with his mother Jen Bernard during sunny 22C weather in this photo taken Friday, Sept. 27, 2013 at Nicholls Oval in Peterborough. (Clifford Skarstedt/QMI AGENCY)

The beautiful colours we see in the fall are all thanks to chemistry, a new video from the American Chemical Society says.

“It’s actually the sugars stored inside trees that help produce some of the most vibrant fall foliage,” the video says.

The stored sugars boost production in a flavonoid Anthocyanin, for example, results in bright red leaves. The pigment known as carotenoids result in yellow tones.

Sunnier fall seasons tend to bring more fall colours.

Watch the video below to learn more about the science behind beautiful fall foliage.

Mobile users can view the video here.


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