A new air pollution testing location opened in Des Moines to monitor airplane emissions. The hope is that the data will help researchers to understand health impacts.

Six trees are scheduled to be removed at Burien's Mathison Park as directed by the Port of Seattle. Author Stuart Jenner shares his perspective on why this matters.

Sea-Tac expansion promises growth, but community advocate Debi Wagner argues nearby communities already pay the price through pollution, illness, and regulatory neglect.

What local governments, schools and water officials are telling the Port about noise, traffic, pollution and other airport expansion impacts.

Tukwila leaders say the Port’s airport review overlooks broader environmental, financial and public health costs borne by neighboring communities.

What will 19 additional airport gates mean for Federal Way? City leaders want clearer answers about noise, health impacts and mitigation.

As Sea-Tac Airport grows, how will the Port make sure area drinking water supplies are protected?

Cities of Burien, SeaTac and Des Moines submitted a 187-page response calling for better science, fuller disclosure and lasting protections for surrounding communities.