The rule will apply to 218 facilities spread across Texas and Louisiana, the Ohio River Valley, West Virginia and the upper South. Photo via Getty Images

More than 200 chemical plants nationwide will be required to reduce toxic emissions that are likely to cause cancer under a new rule issued Tuesday by the Environmental Protection Agency. The rule advances President Joe Biden’s commitment to environmental justice by delivering critical health protections for communities burdened by industrial pollution from ethylene oxide, chloroprene and other dangerous chemicals, officials said.

Areas that will benefit from the new rule include majority-Black neighborhoods outside New Orleans that EPA Administrator Michael Regan visited as part of his 2021 Journey to Justice tour. The rule will significantly reduce emissions of chloroprene and other harmful pollutants at the Denka Performance Elastomer facility in LaPlace, Louisiana, the largest source of chloroprene emissions in the country, Regan said.

“Every community in this country deserves to breathe clean air. That’s why I took the Journey to Justice tour to communities like St. John the Baptist Parish, where residents have borne the brunt of toxic air for far too long,” Regan said. “We promised to listen to folks that are suffering from pollution and act to protect them. Today we deliver on that promise with strong final standards to slash pollution, reduce cancer risk and ensure cleaner air for nearby communities.”

When combined with a rule issued last month cracking down on ethylene oxide emissions from commercial sterilizers used to clean medical equipment, the new rule will reduce ethylene oxide and chloroprene emissions by nearly 80%, officials said.

The rule will apply to 218 facilities spread across Texas and Louisiana, the Ohio River Valley, West Virginia and the upper South, the EPA said. The action updates several regulations on chemical plant emissions that have not been tightened in nearly two decades.

Democratic Rep. Troy Carter, whose Louisiana district includes the Denka plant, called the new rule “a monumental step" to safeguard public health and the environment.

“Communities deserve to be safe. I've said this all along,'' Carter told reporters at a briefing Monday. "It must begin with proper regulation. It must begin with listening to the people who are impacted in the neighborhoods, who undoubtedly have suffered the cost of being in close proximity of chemical plants — but not just chemical plants, chemical plants that don’t follow the rules.''

Carter said it was "critically important that measures like this are demonstrated to keep the confidence of the American people.''

The new rule will slash more than 6,200 tons (5,624 metric tonnes) of toxic air pollutants annually and implement fenceline monitoring, the EPA said, addressing health risks in surrounding communities and promoting environmental justice in Louisiana and other states.

The Justice Department sued Denka last year, saying it had been releasing unsafe concentrations of chloroprene near homes and schools. Federal regulators had determined in 2016 that chloroprene emissions from the Denka plant were contributing to the highest cancer risk of any place in the United States.

Denka, a Japanese company that bought the former DuPont rubber-making plant in 2015, said it “vehemently opposes” the EPA’s latest action.

“EPA’s rulemaking is yet another attempt to drive a policy agenda that is unsupported by the law or the science,” Denka said in a statement, adding that the agency has alleged its facility “represents a danger to its community, despite the facility’s compliance with its federal and state air permitting requirements.”

The Denka plant, which makes synthetic rubber, has been at the center of protests over pollution in majority-Black communities and EPA efforts to curb chloroprene emissions, particularly in the Mississippi River Chemical Corridor, an 85-mile (137-kilometer) industrial region known informally as Cancer Alley. Denka said it already has invested more than $35 million to reduce chloroprene emissions.

The EPA, under pressure from local activists, agreed to open a civil rights investigation of the plant to determine if state officials were putting Black residents at increased cancer risk. But in June the EPA dropped its investigation without releasing any official findings and without any commitments from the state to change its practices.

Regan said the rule issued Tuesday was separate from the civil rights investigation. He called the rule “very ambitious,'' adding that officials took care to ensure “that we protect all of these communities, not just those in Cancer Alley, but communities in Texas and Puerto Rico and other areas that are threatened by these hazardous air toxic pollutants.''

While it focuses on toxic emissions, “by its very nature, this rule is providing protection to environmental justice communities — Black and brown communities, low-income communities — that have suffered for far too long,'' Regan said.

Patrice Simms, vice president of the environmental law firm Earthjustice, called the rule “a victory in our pursuit for environmental justice.”

“There’s always more to do to demand that our laws live up to their full potential,” Simms said, "but EPA's action today brings us a meaningful step closer to realizing the promise of clean air, the promise of safe and livable communities and ... more just and more equitable environmental protections.''

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Houston students take home top prizes at DOE wind energy competition

wind winners

The student-led Rice Wind Energy team clinched second place overall at the U.S. Department of Energy’s 2025 Collegiate Wind Competition (CWC), which challenges students nationwide to design and build wind turbines, develop wind energy projects and engage in public outreach to promote renewable energy.

“The Collegiate Wind Competition is such an incredible opportunity for students passionate about sustainability to gain industry-applicable, hands-on experience in the renewable energy space,” senior and team vice president Jason Yang said in a news release.

The event was hosted by the National Renewable Energy Laboratories at the University of Colorado Boulder campus. Over 40 teams entered the competition, with just 12 advancing to the final stage. The competition comprises four core contests: connection creation, turbine design, turbine testing and project development.

Rice Wind Energy had the largest team with 26 students advancing to the final stage of the competition. It picked up a first-place win in the connection creation contest, and also placed third in the project development, fourth in turbine testing and fifth in turbine design contests.

“This accomplishment is a testament to our focus, teamwork and unwavering determination,” senior Esther Fahel, Rice Wind Energy’s 2024-25 president, said in a news release. “It’s a remarkable experience to have watched this team progress from its inception to the competition podium. The passion and drive of Rice students is so palpable.”

In the Connection Creation contest, the team hosted a wind energy panel with Texas Tech University, invited local high school students to campus for educational activities, produced a series of Instagram reels to address wind energy misconceptions and launched its first website.

The team also developed an autonomous wind turbine and floating foundation design that successfully produced over 20 watts of power in the wind tunnel. They were also one of just a few teams to complete the rigorous safety test, which brought their turbine to below 10 percent of its operational speed within 10 seconds of pressing an emergency stop button. It also designed a 450-megawatt floating wind farm located 38 kilometers off the coast of Oregon by using a multi-decision criteria matrix to select the optimal site, and conducted technical modeling.

“I am amazed at the team’s growth in impact and collaboration over the past year,” senior Ava Garrelts, the team’s Connection Creation lead for 2024-25, said in a news release. “It has been incredible to see our members develop their confidence by building tangible skills and lifelong connections. We are all honored to receive recognition for our work, but the entire experience has been just as rewarding.”

Rice faculty and industry sponsors included David Trevas and faculty advisers Gary Woods and Jose Moreto, Knape Associates, Hartzell Air Movement, NextEra Analytics, RWE Clean Energy, H&H Business Development and GE Vernova, Rice’s Oshman Engineering Design Kitchen, George R. Brown School of Engineering and Computing, Rice Engineering Alumni and Rice Center for Engineering Leadership.

The BYU Wind Energy Team took home the overall first-place prize. A team from the University of Texas at Dallas was the only other Texas-based team to make the 12-team finals.

Houston biotech company continues to expand in Brazil with new research partner

global expansion

Houston biotech company Cemvita has announced a strategic collaboration with Brazilian sustainable research institution REMA.

The move aims to promote Cemvita’s platform for evaluating and testing carbon waste streams as feedstocks for producing sustainable oil, according to the company.

Cemvita utilizes synthetic biology to transform carbon emissions into valuable bio-based chemicals. REMA professors Marcio Schneider and Admir Giachini have previously worked with Cemvita’s CTO, Marcio Busi da Silva, for approximately 20 years.

“This long-standing partnership reflects not only our strong professional ties, but also our shared commitment to advancing science and technology for a more sustainable future," Busi da Silva said in a news release.

REMA’s center is based in Florianópolis and is affiliated with the Federal University of Santa Catarina, which develops cost-effective environmental and technological solutions in automation, chemical engineering, biotech, environmental engineering and agronomy.

“Partnering with REMA in Florianópolis represents a significant step forward in our mission to transform carbon waste into valuable resources,” Tara Karimi, chief science and sustainability officer of Cemvita, said in a news release. “Together, we will enhance our platform’s capabilities, leveraging REMA’s expertise to evaluate and utilize diverse waste streams for sustainable oil production, further advancing the circular bioeconomy in Brazil and beyond.”

Cemvita recently expanded to Brazil to capitalize on the country’s progressive regulatory framework, which includes Brazil’s Fuel of the Future Law. The expansion also aimed to coincide with the 2025 COP30, the UN’s climate change conference, which will be hosted in Brazil in November.

Cemvita became capable of generating 500 barrels per day of sustainable oil from carbon waste at its first commercial plant in 2024, and as a result, Cemvita quadrupled output at its Houston plant. The company originally planned to reach this milestone in 2029.

Also in 2025, Cemvita announced a partnership with Brazil-based Be8 that focused on converting biodiesel byproduct glycerin into low-carbon feedstock to help support the decarbonization of the aviation sector. Cemvita agreed to a 20-year contract that specified it would supply up to 50 million gallons of SAF annually to United Airlines in 2023.

Houston earns No. 3 spot among cities with most Fortune 500 headquarters

biggest companies

Houston maintained its No. 3 status this year among U.S. metro areas with the most Fortune 500 headquarters. Fortune magazine tallied 26 Fortune 500 headquarters in the Houston area, behind only the New York City area (62) and the Chicago area (30).

Last year, 23 Houston-area companies landed on the Fortune 500 list. Fortune bases the list on revenue that a public or private company earns during its 2024 budget year.

On the Fortune 500 list for 2025, Spring-based ExxonMobil remained the highest-ranked company based in the Houston area as well as in Texas, sitting at No. 8 nationally. That’s down one spot from its No. 7 perch on the 2024 list. During its 2024 budget year, ExxonMobil reported revenue of $349.6 billion, up from $344.6 billion the previous year.

Here are the rankings and 2024 revenue for the 25 other Houston-area companies that made this year’s Fortune 500:

  • No. 16 Chevron, $202.8 billion
  • No. 28 Phillips 66, $145.5 billion
  • No. 56 Sysco, $78.8 billion
  • No. 75 Conoco Phillips, $56.9 million
  • No. 78 Enterprise Products Partners, $56.2 billion
  • No. 92 Plains GP Holdings, $50 billion
  • No. 143 Hewlett-Packard Enterprise, $30.1 billion
  • No. 153 NRG Energy, $28.1 billion
  • No. 155 Baker Hughes, $27.8 billion
  • No. 159 Occidental Petroleum, $26.9 billion
  • No. 183 EOG Resources, $23.7 billion
  • No. 184 Quanta Services, $23.7 billion
  • No. 194 Halliburton, $23 billion
  • No. 197 Waste Management, $22.1 billion
  • No. 214 Group 1 Automotive, $19.9 billion
  • No. 224 Corebridge Financial, $18.8 billion
  • No. 256 Targa Resources, $16.4 billion
  • No. 275 Cheniere Energy, $15.7 billion
  • No. 289 Kinder Morgan, $15.1 billion
  • No. 345 Westlake Corp., $12.1 billion
  • No. 422 APA, $9.7 billion
  • No. 443 NOV, $8.9 billion
  • No. 450 CenterPoint Energy, $8.6 billion
  • No. 474 Par Pacific Holdings, $8 billion
  • No. 480 KBR Inc., $7.7 billion

Nationally, the top five Fortune 500 companies are:

  • Walmart
  • Amazon
  • UnitedHealth Group
  • Apple
  • CVS Health

“The Fortune 500 is a literal roadmap to the rise and fall of markets, a reliable playbook of the world's most important regions, services, and products, and an indispensable roster of those companies' dynamic leaders,” Anastasia Nyrkovskaya, CEO of Fortune Media, said in a news release.

Among the states, Texas ranks second for the number of Fortune 500 headquarters (54), preceded by California (58) and followed by New York (53).