Tag Archives: Portland

Air quality at ‘unhealthy’ level in Portland due to wildfires 

A smoky haze from wildfires across the state has settled into the Portland metro area and other parts of the Willamette Valley. Tuesday’s air quality is the worst it has been in weeks, categorized as “unhealthy” most of the afternoon … Continue reading

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Portland air quality remains unhealthy, but some relief may come Friday 

Portland’s air quality rating remains unhealthy on Friday, although some relief may come later in the day. The thick haze from wildfires in British Columbia has blanketed the Portland area this week amid record heat. KGW chief meteorologist Matt Zaffino says westerly winds … Continue reading

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The Moss That Saved Portland 

Roadside plants helped officials trace the source of a public health crisis and led to new standards for clean air in Oregon. Orthotrichum lyellii is the hero of this story. You’ve probably met it before: a tuft of green with … Continue reading

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Moss is useful bioindicator of cadmium air pollution, new study finds 

Moss growing on urban trees is a useful bio-indicator of cadmium air pollution in Portland, Oregon, a U.S. Forest Service Pacific Northwest Research Station-led study has found. The work–the first to use moss to generate a rigorous and detailed map … Continue reading

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