TagEnvironment(185)

This March 2023 technical support document from the Washington State Department of Ecology's Air Quality Program outlines methods for identifying communities that are disproportionately burdened by air pollution across Washington State. It provides regional office contact information and maps showing the four Ecology regions covering all 39 Washington counties. Note: this document focuses on statewide air quality and environmental justice topics and does not contain information specific to Sea-Tac Airport noise policy.

This study examines how the growth of conifer trees planted alongside roads affects their ability to reduce traffic-related air pollution over time. Researchers found that as conifers grow taller, they become less dense, and the ideal tree height for maximum pollution reduction is between 4 and 6 meters. The findings suggest that regular pruning is essential to maintain roadside vegetation barriers at their most effective size for improving air quality in nearby communities.

This 2022 report by EcoDataLab and Stockholm Environment Institute provides a consumption-based greenhouse gas emissions inventory for King County and the broader Puget Sound region, tracking emissions tied to residents' purchases and behaviors across categories such as transportation, food, housing, goods, and services. It analyzes historical emissions trends, neighborhood-level variations, and supply chain stages, then outlines potential strategies for reducing those emissions through policy changes and shifts in household consumption patterns.

A map showing the mitigation bank service area within WRIA 9 (Water Resource Inventory Area 9), encompassing three subwatersheds: the Lower Green River Subwatershed, the Duwamish Estuary Subwatershed, and the Nearshore Subwatershed. The map displays the Green-Duwamish River and its associated streams in the greater Seattle/King County area of Washington State. An inset map shows