big yikes

Houston lands on the wrong end of national pollution report

Houston ranks as the 15th most polluted city in the U.S. No other Texas city appears in the ranking. Photo via Getty Images

Houston just made a list that no one wants it to be on.

Data compiled by the National Public Utilities Council ranks Houston as the 15th most polluted city in the U.S. No other Texas city appears in the ranking. Three California cities — Bakersfield, Visalia, and Fresno — took the top three spots.

The ranking considers a city’s average volume of fine particulate matter in the air per year. Fine particulate matter (formally known as PM2.5) includes soot, soil dust, and sulphates.

The council based its ranking on the average annual concentration of PM2.5 as measured in micrograms per cubic meter of air, known as µg/m3. The ranking lists Houston’s average annual µg/m3 as 11.4. The World Health Organization (WHO) recommends a top µg/m3 of 5, while the American Lung Association sets 9 µg/m as an average annual guideline.

A report released in 2024 by Smart Survey found that the Houston area had just 38 days of good air quality the previous year.

“Most of Houston’s air pollution comes from industrial sources and diesel engines, although sources as diverse as school buses and meat cooking also contribute to … the problem,” the nonprofit Air Alliance Houston says.

The U.S. Environmental Protection Agency says PM2.5 poses “the greatest risk to health” of any particulate matter. Among other health issues, fine particulate matter contributes to cardiovascular disease, lung cancer, and chronic pulmonary disease.

Among the sources of PM2.5 are wildfires, wood-burning stoves, and coal-fired plants, according to the American Lung Association.

The WHO says air pollution causes 7 million deaths annually and may cost the global economy $18 trillion to 25 trillion by 2060. With 70 percent of the population expected to live in urban centers by mid-century, cities are at the forefront of efforts to reduce pollution, according to National Public Utilities Council.

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A View From HETI

Fervo Energy has landed its latest accolade. Photo courtesy Fervo Energy

Houston-based geothermal power company Fervo Energy has notched a three-peat on MIT Technology Review’s annual 10 Climate Tech Companies to Watch List.

“The newly public company is betting that Al’s power boom will help turn enhanced geothermal energy into a scalable reality,” MIT Technology Review says of the three-time honoree.

Fervo went public in May through a $2.2 billion IPO.

Other Fervo recent milestones include:

“We are in the midst of a once-in-a-generation surge in power demand that is likely to dictate the outcome of the American success story in both artificial intelligence and industrial growth, but also the extent to which people have access to affordable, reliable power,” Tim Latimer, co-founder, chairman, president and CEO, said during Fervo’s second-quarter earnings call.

“The stakes have never been higher,” he added, “and I’ve never been more convinced that Fervo is uniquely positioned to meet this moment.”

Also making MIT Technology Review’s fourth annual list were:

  • Greentown Houston alum Energy Dome, based in Milan, Italy. “Energy Dome is using the gas to deliver cheap long-duration energy storage for the grid,” MIT Technology Review says.
  • Greentown Houston alum Moment Energy, based in Vancouver, Canada. “The startup is betting that repurposing — rather than recycling — used EV batteries will help buoy much-needed U.S. supply,” MIT Technology Review says.
  • Greentown Boston member Form Energy, based in Somersville, Massachusetts. It’s a three-time honoree. “Form’s 100-hour batteries could make clean energy more weather-resilient and help power data centers,” MIT Technology Review says.

Greentown Labs is an incubator for climatech and energy startups that's co-located in Houston and Boston. Fervo is also an alum of Greentown Houston.

“Whether early-stage startup or multinational corporation, the businesses we’ve chosen are working on technologies to help us address climate change or adapt to our warming world,” MIT Technology Review says. “There’s an urgent need for these innovators: We must begin to drastically reduce emissions to avoid the deadliest impacts of climate change, while also contending with its harmful effects.”

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