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How Green is Your City? Treepedia Has An Answer

Toronto as seen on Treepedia.

Researchers from MIT Senseable Labs have partnered with the World Economic Forum to bring us Treepedia, an interactive map of green space in cities around the world.

The Treepedia project aims to catalog and compare tree density in world-class cities like New York and Boston. Since its launch in 2016, Treepedia has grown to include 13 major cities around the world, including Toronto and Vancouver.

Why Count Trees?

Because trees are awesome, and the World Economic Forum wants us to recognize it.

Not only are trees a welcome respite from the towers of glass and concrete lining our streets, they provide immeasurable health benefits and contribute to the growth of our cities. Trees shade us from the sun and block shortwave radiation to mitigate extreme temperatures. They naturally dampen the noise from traffic and congestion. Their absorbent roots help stem the tide of floods in severe rain and storm surges. And, of course, trees play an essential role in fighting air pollution.

By measuring and ranking tree density, the researchers hope cities will understand how far they’ve gone in greening their streets – and how much work is to be done.

As this image shows, Treepedia pegs Toronto at 19% green. Meanwhile, Vancouver ranks at 25%. So what does that mean?

The Green View Index

TreepediaRather than put on their hiking books and set out to count each individual tree, the researchers developed a method to measure tree density using Google Street View. They then used the data to develop the “Green View Index”, which can be applied to any city in any country across the globe.

See for yourself how your city ranks on Treepedia’s index.

And just for the record – while Vancouver (25%) trumps Toronto (19%) on the Green View Index, Toronto beats New York (13%) by a long shot.