Dr. Faisal N. Masud, medical director of critical care at Houston Methodist and a champion for sustainability efforts. Courtesy photo

Every industry can play a role in the energy transition, and Houston Methodist is leading the charge in the health care sector.

Culminating at this week’s inaugural Green ICU Conference, part of Houston Energy and Climate Startup Week, the health care system has spent the last three years taking a closer look at its environmental footprint—and showing other hospital systems and medical organizations how they too can make simple changes to reduce emissions.

The event, held tomorrow, Sept. 17, at TMC Helix Park, will bring together health care professionals, industry leaders, policymakers and innovators to explore solutions for building a more sustainable healthcare system.

In an interview with EnergyCapital, Dr. Faisal N. Masud, medical director of critical care at Houston Methodist and a champion for sustainability efforts across the system, shares the inspiration behind the event and what attendees can expect to take away.

Tell us about how the Green ICU Conference came to be.

Houston Methodist’s inaugural Green ICU conference is about three years in the making. It originated because Houston Methodist recognized the significant impact health care has on sustainability and the lack of similar initiatives in the U.S.

The Center for Critical Care at Houston Methodist launched a sustainability-focused ICU initiative, published a roadmap and became involved in international efforts to develop guidelines that many other organizations now use. Our work led to the creation of the first Green ICU Collaborative in the country, and the Green ICU Conference was established to share best practices and address the global impact of critical care on the environment.

What were some of the biggest takeaways from the collaborative, and how are they represented in this new event?

Through the Green ICU Collaborative, we’ve seen that health care professionals can make a significant impact on sustainability through simple, practical changes, and many solutions can be implemented without major costs or compromising patient care. Additionally, there’s a strong link between environmental stewardship and patient safety and quality. These lessons will be represented in the new Green ICU Conference by showcasing easy-to-adopt best practices, emphasizing the importance of sustainability in daily health care operations, and fostering a sense of shared responsibility among attendees to improve both patient outcomes and environmental impact.

Why are ICUs considered to be such carbon hot spots?

ICUs are considered carbon hot spots because they care for the sickest patients, requiring intensive therapies, numerous medications and a large amount of equipment, such as ventilators and pumps. This makes them the most resource- and energy-intensive areas in a hospital. A single day in the ICU can have a greenhouse gas impact equivalent to driving a car 1,000 kilometers.

The U.S. health care sector is responsible for approximately 8.5 percent of greenhouse gas emissions, and hospitals are the second-most energy-intensive commercial buildings in the country. With the Texas Medical Center being in the heart of Houston, it’s critical that health care organizations play a role in this area.

That’s why the Center for Critical Care launched a system-wide Green ICU Initiative with the Houston Methodist Office of Sustainability to help reduce our carbon impact and waste while continuing to provide unparalleled patient care. Innovation is part of our culture, and that extends into our sustainability efforts. Houston Methodist’s Green ICU initiative is the first-of-its-kind in the U.S.

What efforts has Houston Methodist taken to cut emissions?

The first step to cutting emissions is measuring an organization’s carbon footprint to determine the best path forward. Houston Methodist’s Office of Sustainability has aggregated two years of baseline emissions data pending third-party validation. The hospital has taken several steps to cut emissions, including implementing composting programs, installing solar panels, improving energy utilization and participating in global plastic recycling initiatives. These efforts are part of a broader commitment led by our Office of Sustainability to reduce the hospital’s environmental footprint.

Tell us a little more about the event. Who should attend? What do you expect to be some of the highlights?

The Green ICU Conference, taking place during Houston Energy and Climate Week, is focused on health care sustainability, bringing together health care professionals, engineers, experts and anyone interested in reducing health care’s environmental impact. With participants and speakers from six countries, the conference brings together leading experts who aim to raise awareness, share best practices and offer practical, easy-to-adopt solutions for making health care more sustainable.

Highlights include perspectives from leading voices in health care sustainability, real-world examples of successful sustainability initiatives and opportunities for networking and collaboration. Anyone interested in health care, sustainability,or making a positive impact in their community should consider attending.

And, because of increasing interest, we’ve opened up the opportunity for attendees to join virtually at no cost or in person.

What do you hope attendees take away? What are your major goals for the event?

The main goals of hosting the Green ICU Conference for the first time are to raise awareness about the environmental impact of health care; engage and empower attendees to implement easy, practical sustainability solutions; and foster a sense of shared community and responsibility.

I hope attendees leave the event feeling motivated and equipped to make meaningful changes in their own practices, whether that’s improving patient care, supporting their colleagues, or leaving their organization and environment in a better place for future generations.

Texas ranked 24th on SmileHub's list of the best states for sustainable development. Photo via Getty Images.

New report ranks Texas in the middle for sustainable development

room to improve

Texas appears in the middle of the pack in a new ranking of the best states for sustainable development.

SmileHub, a nonprofit that rates charities, examined 20 key metrics to create its list of the best states for sustainable development. Among the metrics it studied were the share of urban tree cover, green buildings per capita and clean energy jobs per capita. Once SmileHub crunched all the numbers, it put Texas in 24th place — one notch above average.

The United Nations defines sustainable development as “meeting present needs without compromising the chances of future generations to meet their needs.”

Here’s how Texas fared in several of SmileHub’s ranking categories:

  • No. 2 for water efficiency and sustainability
  • No. 7 for presence of wastewater reuse initiatives
  • No. 18 for environmental protection charities per capita
  • No. 25 for green buildings per capita
  • No. 34 for clean energy jobs per capita
  • No. 34 for industrial toxins per square mile
  • No. 38 for share of tree cover in urban areas

California leads the SmileHub list, followed by Vermont, Massachusetts, Oregon and Maryland.

When it comes to water, a 2024 report commissioned by Texas 2036, a nonpartisan think tank, recommends that Texas invest $154 billion over the next 50 years in new water supply and infrastructure to support sustainable growth, according to the Greater Houston Partnership.

“The report underscores a stark reality: a comprehensive, sustainable funding strategy for water is necessary to keep Texas economically resilient and competitive,” the partnership says.

Rice University has established a new center that will work toward meeting the Environmental Protection Agency's strict standards for PFAS. Photo by Jeff Fitlow/Rice University

New research center at Rice aims to work toward strict EPA standards for forever chemicals

pfas r&d

Rice University announced a new research center that will focus on per- and polyfluoroalkyl substances (PFAS) called the Rice PFAS Alternatives and Remediation Center (R-PARC).

R-PARC promises to unite industry, policy experts, researchers, and entrepreneurs to “foster collaboration and accelerate the development of innovative solutions to several PFAS challenges,” according to a news release. Challenges include comprehensive PFAS characterization and risk assessment, water treatment infrastructure upgrades, contaminated site remediation, and the safe alternatives development.

“We firmly believe that Rice is exceptionally well-positioned to develop disruptive technologies and innovations to address the global challenges posed by PFAS,” Rice President Reginald DesRoches says in a news release. “We look forward to deepening our relationship with ERDC and working together to address these critical challenges.”

The Environmental Protection Agency issued its stringent standards for some of the most common PFAS, which set the maximum contaminant level at 4.0 parts per trillion for two of them. Pedro Alvarez, Rice’s George R. Brown Professor of Civil and Environmental Engineering, director of the WaTER Institute, likened this in a news release to “four drops in 1,000 Olympic pools,” and also advocated that the only way to meet these strict standards is through technological innovation.

The center will be housed under Rice’s Water Technologies Entrepreneurship and Research (WaTER) Institute that was launched in January 2024. The WaTER Institute has worked on advancements in clean water technology research and applications established during the decade-long tenure of the Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment, which was funded by the National Science Foundation.

“The challenge of PFAS cuts across several of the four major research trajectories that define Rice’s strategic vision,” Rice’s executive vice president for research and professor of materials science and nanoengineering and physics and astronomy Ramamoorthy Ramesh, adds in the release. “R-PARC will help focus and amplify ongoing work on PFAS remediation at Rice.”

The ERDC delegation was led by agency director David Pittman who also serves as the director of research and development and chief scientist for the U.S. Army Corps of Engineers. ERDC representatives also met with several Rice researchers that were involved in work related to the environment, and sustainability, and toured the labs and facilities.

Madewell is just one of the Houston retailers accepting used clothing and denim for recycling. Photo courtesy of Madewell

6 sustainability-minded Houston stores giving discounts for old clothes

CLOTHES THE LOOP

Shopping is fun, but it comes with the unseen price tag of more than 92 million tons of global textile waste generated each year. With the apparel industry's global emissions predicted to increase by 50 percent in just six years, many see this as a full-blown climate crisis that is already affecting people across the globe.

To combat this problem, several retailers have committed to bolstering their sustainability efforts. From recycling linens, towels, pillows, and robes to upcycling denim, companies are finding ways for every textile to be saved from the landfill and either re-worn, repurposed, or recycled.

Stores trying to make a difference include Patagonia, North Face, J.Jill, Carter's, and DSW Shoes. To make summer vacation and back-to-school shopping more environmentally friendly, we've rounded up six Houston retailers where customers can trade in used clothing and textiles for exclusive discounts.

Gap

Gap has partnered with ThredUp, an online resale company, to recycle gently used clothing for their Gap for Good initiative. Customers can activate a kit and get a label here, fill the bag, and drop it off at any FedEx or post office location. If ThredUp selects any items for resale, customers can choose to receive either cash or store credit. Those who opt for store credit and use it at any Gap Inc.-brand stores will receive an additional 15% off their purchase. For clothes not chosen for resale, ThredUp offers recycling services, or the items can be mailed back to the customer for a fee.

H&M

According to H&M's website, its worldwide garment recycling program, launched in 2013, is "the biggest of its kind in the world." Customers can get 15 percent off their purchase by bringing unwanted clothes or textiles — from any brand and in any condition — to one of its stores. Turn them in at the cashier's kiosk and receive a coupon for their next purchase. The clothing and textiles will be sorted into three categories: re-wear, reuse, or recycling.

Levi's

Levi's aims to keep its coveted jeans in circulation and out of landfills with its trade-in program. The brand accepts denim and trucker jackets that are still in good condition; they repair any minor damage, sanitize the items, and resell them through their secondhand shop. Customers will receive a gift card ranging from $5 to $30, depending on the value of the item traded in. Customers must make an appointment to take advantage of this program, and only certain types of denim are accepted. A complete list of requirements is available here.

Lululemon

Have a drawer full of old Lululemon workout gear? Trade it in for a gift card towards a future purchase. The garment does not need to have its care tag, size tag, or price tag for this initiative; the workout brand accepts clean and gently worn (items with no damage, pilling, rips, or discoloration) women's and men's Lululemon clothing and bags for their Like New program. Except for outlet stores, every Lululemon outpost can accept items for the Like New program. Check what they're taking before going to the store, because items cycle in and out depending on seasonality and inventory. The value of the gift card customers will receive is determined by the value of the items traded in, but generally ranges in price from $5 to $25 and can be redeemed in-store or online.

Madewell

Madewell is on a mission to become fully sustainable, defined as using only fibers sustainably sourced and free of virgin plastics, by 2025. It has partnered with Cotton's Blue Jeans Go Green program to repurpose denim and keep it out of landfills by turning old jeans into housing insulation.

To participate in Madewell's recycling program, bring any brand or style of jeans in any condition to any Madewell store. If shipping is more convenient, activate a Clean Out Kit here or print out a free shipping label and mail in women's previously used clothing, handbags, shoes, and accessories from any brand. In exchange, customers will get a coupon for $20 off purchasing one new pair of Madewell jeans.

Parachute

Parachute, the beloved home essentials brand, is celebrating its 10th anniversary by launching a recycling program. In partnership with SuperCircle, they accept used towels, sheets, and robes. Although there are several recycling programs for clothing, shoes, and accessories, Parachute is pioneering this type of program in the home textile sector.

To participate in the program, customers can take their sheets, towels, pillows, and robes in any condition from any brand to Parachute's Rice Village store. They'll sort and recycle donated items for a second life – from new textiles to new projects, including furniture batting, insulation, and padding – sending nothing to landfill. In return, customers will receive a discount on their next Parachute purchase.

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This article originally ran on CultureMap.

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Houston microgrid company names new CEO

new hire

Houston-based electric microgrid company Enchanted Rock has named a new CEO.

John Carrington has assumed the role after serving as Enchanted Rock's executive chairman since June, the company announced earlier this month.

Carrington most recently was CEO of Houston-based Stem, which offers AI-enabled software and services designed for setting up and operating clean energy facilities. He stepped down as Stem’s CEO in September 2024. Stem, which was founded in 2006 and went public under Carrington's leadership in 2021, was previously based in San Francisco.

Carrington has also held senior leadership roles at Miasolé, First Solar and GE.

Corey Amthor has served as acting CEO of Enchanted Rock since June. He succeeded Enchanted Rock founder Thomas McAndrew in the role, with McAndrew staying on with the company as a strategic advisor and board member. With the hiring of Carrington, Amthor has returned to his role as president. According to the company, Amthor and Carrington will "partner to drive the company’s next phase of growth."

“I’m proud to join a leadership team known for technical excellence and execution, and with our company-wide commitment to innovation, we are well positioned to navigate this moment of unprecedented demand and advance our mission alongside our customers nationwide,” Carrington said in the news release. “Enchanted Rock’s technology platform delivers resilient, clean and scalable ultra-low-emissions onsite power that solves some of the most urgent challenges facing our country today. I’m energized by the strong momentum and growing market demand for our solutions, and we remain committed to providing data centers and other critical sectors with the reliable power essential to their operations.”

This summer, Enchanted Rock also announced that Ian Blakely would reassume the role of CFO at the company. He previously served as chief strategy officer. Paul Froutan, Enchanted Rock's former CTO, was also named COO last year.

6 major acquisitions that fueled the Houston energy sector in 2025

2025 In Review

Editor's note: As 2025 comes to a close, we're revisiting the biggest headlines and major milestones of the energy transition sector this year. Here are six major acquisitions that fueled the Houston energy industry in 2025:

Houston-based Calpine Corp. to be acquired in clean energy megadeal

Houston's Calpine Corp. will be acquired by Baltimore-based nuclear power company Constellation Energy Corp. Photo via DOE

In January 2025, Baltimore-based nuclear power company Constellation Energy Corp. and Houston-based Calpine Corp. entered into an agreement where Constellation would acquire Calpine in a cash and stock transaction with an overall net purchase price of $26.6 billion. The deal received final regulatory clearance this month.

Investment giant to acquire TXNM Energy for $11.5 billion

Blackstone Infrastructure, an affiliate of Blackstone Inc., will acquire a major Texas electricity provider. Photo via Shutterstock

In May 2025, Blackstone Infrastructure, an investment giant with $600 million in assets under management, agreed to buy publicly traded TXNM Energy in a debt-and-stock deal valued at $11.5 billion. The deal recently cleared a major regulatory hurdle, but still must be approved by the Public Utility Commission of Texas.

Houston's Rhythm Energy expands nationally with clean power acquisition

PJ Popovic, founder and CEO of Houston-based Rhythm Energy, which has acquired Inspire Clean Energy. Photo courtesy of Rhythm

Houston-based Rhythm Energy Inc. acquired Inspire Clean Energy in June 2025 for an undisclosed amount. The deal allowed Rhythm to immediately scale outside of Texas and into the Northeast, Midwest and mid-Atlantic regions.

Houston American Energy closes acquisition of New York low-carbon fuel co.

Houston American Energy Corp. has acquired Abundia Global Impact Group, which converts plastic and certified biomass waste into high-quality renewable fuels. Photo via Getty Images.

Renewable energy company Houston American Energy Corp. (NYSE: HUSA) acquired Abundia Global Impact Group in July 2025. The acquisition created a combined company focused on converting waste plastics into high-value, drop-in, low-carbon fuels and chemical products.

Chevron gets green light on $53 billion Hess acquisition

With the deal, Chevron gets access to one of the biggest oil finds of the decade. Photo via Chevron

In July 2025, Houston-based Chevron scored a critical ruling in Paris that provided the go-ahead for a $53 billion acquisition of Hess and access to one of the biggest oil finds of the decade. Chevron completed its acquisition of Hess shortly after the ruling from the International Chamber of Commerce in Paris.

Investors close partial acquisition of Phillips 66 subsidiary with growing EV network

Two investment firms have scooped up the majority stake in JET, a subsidiary of Phillips 66 with a rapidly growing EV charging network. Photo via Jet.de Facebook.

In December 2025, Energy Equation Partners, a London-based investment firm focused on clean energy companies, and New York-based Stonepeak completed the acquisition of a 65 percent interest in JET Tankstellen Deutschland GmbH, a subsidiary of Houston oil and gas giant Phillips 66.

Houston researchers develop energy-efficient film for AI chips

AI research

A team of researchers at the University of Houston has developed an innovative thin-film material that they believe will make AI devices faster and more energy efficient.

AI data centers consume massive amounts of electricity and use large cooling systems to operate, adding a strain on overall energy consumption.

“AI has made our energy needs explode,” Alamgir Karim, Dow Chair and Welch Foundation Professor at the William A. Brookshire Department of Chemical and Biomolecular Engineering at UH, explained in a news release. “Many AI data centers employ vast cooling systems that consume large amounts of electricity to keep the thousands of servers with integrated circuit chips running optimally at low temperatures to maintain high data processing speed, have shorter response time and extend chip lifetime.”

In a report recently published in ACS Nano, Karim and a team of researchers introduced a specialized two-dimensional thin film dielectric, or electric insulator. The film, which does not store electricity, could be used to replace traditional, heat-generating components in integrated circuit chips, which are essential hardware powering AI.

The thinner film material aims to reduce the significant energy cost and heat produced by the high-performance computing necessary for AI.

Karim and his former doctoral student, Maninderjeet Singh, used Nobel prize-winning organic framework materials to develop the film. Singh, now a postdoctoral researcher at Columbia University, developed the materials during his doctoral training at UH, along with Devin Shaffer, a UH professor of civil engineering, and doctoral student Erin Schroeder.

Their study shows that dielectrics with high permittivity (high-k) store more electrical energy and dissipate more energy as heat than those with low-k materials. Karim focused on low-k materials made from light elements, like carbon, that would allow chips to run cooler and faster.

The team then created new materials with carbon and other light elements, forming covalently bonded sheetlike films with highly porous crystalline structures using a process known as synthetic interfacial polymerization. Then they studied their electronic properties and applications in devices.

According to the report, the film was suitable for high-voltage, high-power devices while maintaining thermal stability at elevated operating temperatures.

“These next-generation materials are expected to boost the performance of AI and conventional electronics devices significantly,” Singh added in the release.

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This article originally appeared on our sister site, InnovationMap.