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The rise of the urban jungle

0 Views April 6, 2017
The rise of the urban jungle

What do an avenue of grand oaks, a community park and a rooftop vegetable patch have in common?

They can all form part of a city’s “urban forest”, which numerous studies over the past decade have concluded make people happier.

And that’s not their only job: urban forests protect our cities from extreme weather, climate change and water scarcity.

But with more than 70% of people expected to have squeezed into cities by 2050, this green infrastructure is under threat, according to the UN’s Food and Agriculture Organization (FAO).

“The cities of the future are going to have major problems in making sure that people live a decent life,” Simone Borelli, an urban forestry expert and co-author of a recent FAO report on global urban forestry guidelines, tells CNN.

you may not associate big cities like Singapore, New York or Paris with forestry but look closely: each has its own green canopy to varying degrees.

This “urban forest” is defined by the FAO as “the networks or systems comprising all woodlands, groups of trees, and individual trees located in urban and peri-urban areas” — it encompasses everything from grand parks down to a single tree.

He lists their advantages: urban forests can protect a city’s land and water supply, acting as natural infrastructure that protects soil and absorbs rainwater, thereby reducing runoff which causes erosion of soil and sedimentation in local water supplies.

“In Vancouver a few years ago, we had a million people without drinking water for almost a month because they had so much heavy rain and it whipped up the mud and the sediment in the reservoirs and it wasn’t safe to drink,” explains Sheppard.

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