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Houston ranks No. 99 out of 100 on new report of greenest U.S. cities

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Houston had two big strikes against it on WalletHub's Greenest Cities in America report. Photo via Getty Images.

Houstonians may be feeling blue about a new ranking of the greenest cities in the U.S.

Among the country’s 100 largest cities based on population, Houston ranks 99th across 28 key indicators of “green” living in a new study from personal finance website WalletHub. The only city with a lower ranking is Glendale, Arizona. Last year, Houston landed at No. 98 on the WalletHub list.

“‘Green’ living means a choice to engage in cleaner, more sustainable habits in order to preserve the planet as much as possible,” WalletHub says.

Among the study’s ranking factors are the amount of greenhouse gas emissions per capita, the number of “smart energy” policies, and the presence of “green job” programs.

In the study, Houston received an overall score of 35.64 out of 100. WalletHub put its findings into four buckets, with Houston ranked 100th in the environment and transportation categories, 56th in the lifestyle and policy category, and 52nd in the energy sources category.

In the environment category, Houston has two big strikes against it. The metro area ranks among the 10 worst places for ozone pollution (No. 7) and year-round particle pollution (No. 8), according to the American Lung Association’s 2025 list of the most polluted cities.

In the WalletHub study, San Jose, California, earns the honor of being the country’s greenest city. It’s followed by Washington, D.C.; Oakland, California; Irvine, California; and San Francisco.

“There are plenty of things that individuals can do to adopt a green lifestyle, from recycling to sharing rides to installing solar panels on their homes,” WalletHub analyst Chip Lupo said in the report. “However, living in one of the greenest cities can make it even easier to care for the environment, due to sustainable laws and policies, access to locally grown produce, and infrastructure that allows residents to use vehicles less often. The greenest cities also are better for your health due to superior air and water quality.”

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Leader tapped for Texas 'nuclear renaissance' and more energy news to know

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Editor's note: The top energy transition stories for the start of October include Texas' big bet on nuclear energy, ERCOT's innovative efforts, CenterPoint's capital improvement plan, and more. Read on for the five most-read EnergyCapitalHTX stories published Oct.1-15, 2025:


1. Policy adviser tapped to lead ‘nuclear renaissance’ in Texas

Jarred Shaffer has been named director of the new Texas Advanced Nuclear Energy Office. Photo via LinkedIn.

As Texas places a $350 million bet on nuclear energy, a budget and policy adviser for Gov. Greg Abbott has been tapped to head the newly created Texas Advanced Nuclear Energy Office. Jarred Shaffer is now director of the nuclear energy office, which administers the $350 million Texas Advanced Nuclear Development Fund. The fund will distribute grants earmarked for the development of more nuclear reactors in Texas. Continue reading.

2. ERCOT steps up grid innovation efforts to support growing power demand

ERCOT has launched its new Grid Research, Innovation, and Transformation (GRIT) initiative to help resolve grid challenges and meet growing demand. Photo via Getty Images

As AI data centers gobble up more electricity, the Electric Reliability Council of Texas (ERCOT) — whose grid supplies power to 90 percent of Texas — has launched an initiative to help meet challenges presented by an increasingly strained power grid. ERCOT, based in the Austin suburb of Taylor, said its new Grid Research, Innovation, and Transformation (GRIT) initiative will tackle research and prototyping of emerging technology and concepts to “deeply understand the implications of rapid grid and technology evolution, positioning ERCOT to lead in the future energy landscape.” Continue reading.

3. CenterPoint launches $65B capital improvement plan

CenterPoint Energy has launched a $65 million capital improvement plan that will focus on building and maintaining a “resilient” electric grid. Photo via centerpointenergy.com

To support rising demand for power, Houston-based utility company CenterPoint Energy has launched a $65 billion, 10-year capital improvement plan. CenterPoint said that in its four-state service territory — Texas, Indiana, Minnesota and Ohio — the money will go toward building and maintaining a “resilient” electric grid and a safe natural gas system. Continue reading.

4. UH projects propose innovative reuse of wind turbines and more on Gulf Coast

The Houston projects involve the innovative reuse of oil rig platforms and wind turbines. Courtesy rendering

Two University of Houston science projects have been selected as finalists for the Gulf Futures Challenge, which will award a total of $50 million to develop ideas that help benefit the Gulf Coast. Sponsored by the National Academies of Science, Engineering and Medicine’s Gulf Coast Research Program and Lever for Change, the competition is designed to spark innovation around problems in the Gulf Coast, such as rising sea levels, pollution, energy security, and community resiliency. The two UH projects beat out 162 entries from organizations based in Alabama, Florida, Louisiana, Mississippi, and Texas. Continue reading.

5. Energy startup Base Power raises $1 billion series C round

Base Power, founded by Justin Lopas and Zach Dell, has closed one of the largest venture capital deals of the year. Photo courtesy Base Power.

Austin-based startup Base Power, which offers battery-supported energy in the Houston area and other regions, has raised $1 billion in series C funding—making it one of the largest venture capital deals this year in the U.S. Continue reading.

Greentown to add new Houston AI lab from latest Houston partner

AI partnership

Greentown Labs has partnered with Shoreless to launch an AI lab within its Houston climatetech incubator.

"Climatetech and energy startups are transforming industries, and AI is a critical tool in that journey," Lawson Gow, Greentown's Head of Houston, said in a news release. "We're excited to bring this new offering to our entrepreneurs and corporate partners to enhance the way they think about reducing costs and emissions across the value chain."

Shoreless, a Houston-based company that enables AI adoption for enterprise systems, will support startups developing solutions for supply-chain optimization and decarbonization. They will offer Greentown members climate sprint sessions that will deliver AI-driven insights to assist companies in reducing Scope 3 emissions, driving new revenue streams and lowering expenses. Additionally, the lab will help companies test their ideas before attempting to scale them globally.

"The future of climatetech is intertwined with the future of AI," Ken Myers, Founder and CEO of Shoreless, said in a news release."By launching this AI lab with Greentown Labs, we are creating a collaborative ecosystem where innovation can flourish. Our agentic AI is designed to help companies make a real difference, and we are excited to see the groundbreaking solutions that will emerge from this partnership."

Greentown and Shoreless will collaborate on workshops that address industry needs for technical teams, and Shoreless will also work to provide engagement opportunities and tailored workshops for Greentown’s startups and residents. Interested companies can inquire here.

Recently, Greentown Labs also partnered with Los Angeles-based software development firm Nominal to launch the new Industrial Center of Excellence at Greentown's Houston incubator. It also announced a partnership with Houston-based EnergyTech Nexus, which will also open an investor lounge on-site last month. Read more here.

UH lands $8M in federal funding for fusion energy research

fusion funding

The University of Houston will receive $8 million in federal funding from the U.S. Department of Energy for its work on fusion technology to help power data centers and medical work.

Venkat Selvamanickam, professor at UH’s Cullen College of Mechanical and Aerospace Engineering and director of the Advanced Manufacturing Institute, has been tasked to lead the research on superconducting magnets that he said will make compact fusion reactors possible.

“Beyond fusion, superconductors can transform how we deliver power to data centers, enable highly efficient motors and generators and improve electric power devices,” Selvamanickam said in a news release. “They also enable critical applications such as MRI and proton beam therapy for cancer treatment. I want society to experience the broad benefits this remarkable technology can provide.”

UH is one of 23 institutions selected to share part of $134 million from the DOE’s Fusion Energy Sciences division. The total funding is split across two initiatives: $128 million for the Fusion Innovation Research Engine (FIRE) and $6.1 million for the Innovation Network for Fusion Energy program, according to the university.

UH will partner with the FIRE Collaborative for the research, which looks to understand why superconducting magnets in fusion reactors break down and work on developing solutions to make them more resilient.

“The advantage of fusion is it’s clean and it does not require storage. Solar energy can’t be used at night, and wind energy depends on wind conditions,” Selvamanickam added in the release. “Our goal is to make fusion a truly viable energy source.”

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