The region has a lot more cleaning up to do, even in its greenest corners.
Cascadia chalked up major climate wins in 2023, from Washington's renewed commitment to eliminating gas appliances in new buildings to Montana youth's historic court win for a clean and healthy climate. At the same time, many Northwest climate hawks are gearing up for new challenges in 2024, including a likely bitter fight to defend Washington's landmark climate law, the Climate Commitment Act, from a rightwing repeal effort.
Still, as policy debates rage, it can be easy to forget that every day, scores of huge polluters continue to dirty Cascadia's air, making the worst effects of climate change ever more difficult to stave off. Cascadia counts 180 stationary facilities that each spew more than 100,000 metric tons of carbon dioxide equivalent (CO2e) into the atmosphere every year.
(For the purposes of this article, Cascadia refers to Alaska, British Columbia, Idaho, Montana, Oregon, and Washington. The analysis covers the entirety of the states and province for data simplicity, not only the Cascadian bioregion.) The biggest emitters range from coal-fired power plants to sugar processing plants, from electronics manufacturers to pulp and paper mills, from landfills to oil refineries to zinc mines.
Across the region, power plants, oil and gas facilities, and the forest products industry top the list of biggest stationary polluters, as shown by the charts below, the first broken by down state and industry, the second simply by industry, and the following broken out for each state or province.
Collectively, these establishments emit roughly 80 million metric tons of carbon pollution annually from fossil fuels, about a quarter of Cascadia's total greenhouse gas emissions. These facilities' emissions rise to more than 103 million metric tons of carbon pollution annually - more than comes from driving 23 million gasoline-powered cars in a year - when biogenic emissions are included.
(For context, the United States counts 278 million registered vehicles.) Nearly half that carbon comes from just 20 facilities in Cascadia, indicated by the boxes at right in the chart below.
Cleaning up these institutions is no simple task. Few can easily decarbonize with current technology. Some employ hundreds or even thousands of people. Still, policymakers can't afford to ignore them in their efforts to address climate change and improve air quality.
That's especially important in British Columbia, Oregon, and Washington, which many consider to be the greenest jurisdictions in Cascadia yet are home to 120 of the region's 180 top polluters. While all three state or provincial governments have passed policies to reduce emissions from big stationary sources, notable loopholes remain. The first step, though, is understanding who the top polluters are and what exceptions to climate laws they enjoy today. With that in mind, Sightline offers four takeaways for Cascadian policymakers.
1. COAL MAY NOT POWER OREGON OR WASHINGTON FOR LONG, BUT IT COULD DIRTY CASCADIA FOR DECADES
Far and away Cascadia's biggest polluter is the gargantuan coal-fired power plant in Colstrip, Montana. Emitting more than 10 million metric tons of carbon annually, it spews nearly three times as much CO2e as the next biggest polluter on the list. In fact, it releases so much carbon from burning coal to make electricity that it carries the dubious distinction of being one of the top emitters in the entire United States.
Today, six utilities across the Northwest - Avista, NorthWestern Energy, PacifiCorp, Portland General Electric (PGE), Puget Sound Energy (PSE), and Talen Energy - co-own the plant. But Washington and Oregon passed laws requiring utilities in these states to remove coal from their portfolios by 2025 and 2030, respectively. PGE demolished Oregon's last coal-fired plant near Boardman in 2022, and TransAlta will shutter Washington's last coal-fired plant by 2025. As such, residents in western Cas...