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The state’s cap-and-trade system is met with skepticism and grudging acceptance as companies pass the program’s cost to consumer pocketbooks.

As wildfire risk increases, so does the frequency of hazy, hazardous days. Here are some tips on monitoring air quality – and your health.

Policymakers and homeowners are scrambling to manage so-called 'wildland-urban interface' to mitigate the threat.

A new study concludes that climate-boosted wildfires are significantly altering carbon monoxide levels in the region — and the effects reach far beyond the Cascades.

Storm-related sewage spills dump about 93 million gallons of chemical discharge a year into Puget Sound.