Q&A: Here’s why leaves change colour as we head into the fall [Video]

It’s a marvellous time of year in the Forest City as the vast canopy turns from green to vibrant shades of red, orange and yellow.

If you want to see the beautiful colours of fall from a unique vantage point, the City of London has opened its top-floor observation deck. You can visit the city’s website to reserve a time to see the fall landscape until mid-October.

To find out about the science behind the annual changes, London Morning host Andrew Brown talked to local arborist Isaac Ladore with Koala Tree Services.

The following has been edited for length and clarity.

Andrew Brown: So what’s happening out there that makes the leaves change colour?

Isaac Ladore: As the cooler seasons approach and the trees start to enter their dormant stage, the production of chlorophyll, which is a big player in photosynthesis, starts …