Building the World

CITIES: Leafing Out

| 0 comments

“Chestnut trees in blossom, Boulevard Arago, Paris, France.” 2012. Image: wikimedia commons

Today is Arbor Day; it began in 1872 when the newly settled state of Nebraska noted the need for trees and instituted a tree-planting holiday. But this year, there will be less greenery, because American cities are losing 36 million trees – per year.  Increased development is the main reason for urban tree loss, but arboreal disease, insects, fires, hurricanes, and storms also bring loss. When city trees are replaced by buildings or parking lots, the ground that formerly absorbed rain is now impervious.  Paris, France announced a goal of making 50% of the city’s surfaces permeable. Gardens and lawns near the Eiffel Tower will also be extended in preparation for the Paris 2024 Olympics.

TEN BENEFITS OF TREES

Heat reduction – when tree canopy covers 40% of an area, there is a 10 degree (F) cooling

Air quality – trees absorb carbon emissions and pollution

Energy reduction – trees reduce energy costs by $4 billion per year

Water quality – trees cleanse surface water, returning it to groundwater

Flood reduction – trees absorb water and reduce runoff to rivers and streams

Noise reduction – trees muffle traffic noise and add natural sounds of birds and wind

UV radiation protection – trees absorb 96% of ultraviolet radiation

Aesthetics – trees improve property appearance, and value

Health – tree-lined areas have statistically lower human sickness and death rates

Habitat – trees house birds; forests promote wildlife diversity

If you’d like to help maintain and nurture urban tress, consider helping organizations such as the Arbor Day Foundation, and Sustainable Urban Forests Coalition.

Block, India. “Paris plans to go green by planting “urban forest” around architectural landmarks.” 26 June 2019. Dezeen.com. https://www.dezeen.com/2019/06/26/paris-urban-forest-plant-trees-landmarks/

Chillag, Amy. “US cities are losing 36 million trees a year. Here’s why it matters and how you can stop it.” 18 September 2019. CNN.com. https://www.cnn.com/2019/07/20/health/iyw-cities-losing-36-million-trees-how-to-help-trnd/index.html

Building the World Blog by Kathleen Lusk Brooke and Zoe G. Quinn is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unp

Print Friendly, PDF & Email

Leave a Reply

Required fields are marked *.


Skip to toolbar