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Seattle is called the Emerald City in part due to all the green foliage. However, the city is a little less green, according to a new report on the city’s tree canopy.

The City of Seattle released the final聽 Wednesday showing the city has lost 255 acres of tree canopy since 2016. This is a 1.7% relative decline in the amount of tree coverage around the city, roughly the size of Green Lake.

As climate change progresses, trees in cities struggle

“Our vision for the urban forest is a Seattle where everyone鈥攕tarting with those most harmed by current and existing racial inequities鈥攈as access to trees and the benefits they provide and where we keep our trees and forest healthy and thriving in the face of a changing climate,” the report read.

Seattle鈥檚 goal is to achieve 30% citywide canopy cover by 2037, distributed equitably, as well as to improve tree health and resilience to climate change.

Part of the impact of the loss of foliage includes the fact that neighborhoods impacted by racial and economic injustice started with less canopy and lost more than the citywide average. Less economically wealthy neighborhoods, and also more racially diverse ones, had 31% less canopy in 2021, an increase in disparity from 2016 (when they had 27% less).

This is an important problem to solve, said Seattle Mayor Bruce Harrell.

鈥淐ritical for ensuring Seattle’s standing as a truly emerald and evergreen city, trees provide essential benefits to our communities from heat mitigation to air quality improvement and overall wellbeing,” Harrell said. “This decline in canopy cover means we need to do more to plant, preserve, and protect trees to meet our goals for Seattle鈥檚 canopy, climate, and communities.

鈥淭he information in this report is informing our upcoming efforts to drive improvements — including new strategies to plant more trees and maintain our existing canopy, all while prioritizing equity in neighborhoods who face the worst impacts of climate change,鈥� Harrell continued.

Of the canopy lost, nearly 43% of it was from city parks, despite parks making up only 5% of the city’s land usage. These areas require active management to ensure long-term forest health and resilience, and losses here may be due to aging deciduous trees coming down naturally or being selectively removed to allow for the growth of evergreen trees.

Patti Bakker, Urban Forestry Advisor with Seattle鈥檚 Office of Sustainability & Environment, said that the loss of the canopy is due to a lot of factors, including costs, development, and climate.

鈥淭he reasons for tree canopy loss are complex and not due to one single cause, and our solutions must also be multi-faceted,鈥澛爏aid Bakker. 鈥淐limate change, aging trees, making way for other uses such as infrastructure, development projects and other needs in residential yards, increasing budget and maintenance costs, and more, all contribute to changes in our tree canopy. We will continue to work to improve the stability and coverage of our tree canopy so the benefits of our trees can be felt by all.鈥�

The city has said that they will continue to conduct detailed analyses with the data to develop a Tree Canopy Equity & Resilience Plan, which will serve as the citywide plan for how we will equitably reach our canopy cover goals, and to continue to update our urban forestry management work.