Houston could have ranked higher on a global report of top cities in the world if it had a bit more business diversification. Photo via Getty Images

A new analysis positions the Energy Capital of the World as an economic dynamo, albeit a flawed one.

The recently released Oxford Economics Global Cities Index, which assesses the strengths and weaknesses of the world’s 1,000 largest cities, puts Houston at No. 25.

Houston ranks well for economics (No. 15) and human capital (No. 18), but ranks poorly for governance (No. 184), environment (No. 271), and quality of life (No. 298).

New York City appears at No. 1 on the index, followed by London; San Jose, California; Tokyo; and Paris. Dallas lands at No. 18 and Austin at No. 39.

In its Global Cities Index report, Oxford Economics says Houston’s status as “an international and vertically integrated hub for the oil and gas sector makes it an economic powerhouse. Most aspects of the industry — downstream, midstream, and upstream — are managed from here, including the major fuel refining and petrochemicals sectors.”

“And although the city has notable aerospace and logistics sectors and has diversified into other areas such as biomedical research and tech, its fortunes remain very much tied to oil and gas,” the report adds. “As such, its economic stability and growth lag other leading cities in the index.”

The report points out that Houston ranks highly in the human capital category thanks to the large number of corporate headquarters in the region. The Houston area is home to the headquarters of 26 Fortune 500 companies, including ExxonMobil, Hewlett Packard Enterprise, and Sysco.

Another contributor to Houston’s human capital ranking, the report says, is the presence of Rice University, the University of Houston and the Texas Medical Center.

“Despite this,” says the report, “it lacks the number of world-leading universities that other cities have, and only performs moderately in terms of the educational attainment of its residents.”

Slower-than-expected population growth and an aging population weaken Houston’s human capital score, the report says.

Meanwhile, Houston’s score for quality is life is hurt by a high level of income inequality, along with a low life expectancy compared with nearly half the 1,000 cities on the list, says the report.

Also in the quality-of-life bucket, the report underscores the region’s variety of arts, cultural, and recreational activities. But that’s offset by urban sprawl, traffic congestion, an underdeveloped public transportation system, decreased air quality, and high carbon emissions.

Furthermore, the report downgrades Houston’s environmental stature due to the risks of hurricanes and flooding.

“Undoubtedly, Houston is a leading business [center] that plays a key role in supporting the U.S. economy,” says the report, “but given its shortcomings in other categories, it will need to follow the path of some of its more well-rounded peers in order to move up in the rankings.”

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This article originally ran on InnovationMap.

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6 must-attend Houston energy events in December 2025

Event Guide

Editor's note: The year is coming to a close, but there are still exciting energy events to attend in Houston this month. Mark your calendar now for pitch days, seminars, networking, and Reuters Energy LIVE 2025.

Dec. 4 — Resiliency & Adaptation Sector Pitch Day

Join innovators, industry leaders, investors, and policymakers as they explore breakthrough climate and energy technologies at Greentown Labs' latest installment of its Sector Pitch Day series, focused on resiliency and adaptation. Hear from Adrian Trömel, Chief Innovation Officer at Rice University; Eric Willman, Executive Director of the Rice WaTER Institute; pitches from 10 Greentown startups; and more.

This event is Thursday, Dec. 4, from 1-3:30 p.m. at the Ion. The Ion Holiday Block Party follows. Register here.

Dec. 8 — Pumps & Pipes Annual Event 2025

The annual gathering brings together cross-industry leaders in aerospace, energy and medicine for engaging discussions and networking opportunities. Connor Grennan, Chief AI Architect at the NYU Stern School of Business, will present this year's keynote address, "Practical Strategies to Increase Productivity." Other sessions will feature leaders from Cena Research Institute, NASA Ames Research Center, ExxonMobil, Southwest Airlines, and more.

This event is Monday, Dec. 8, from 8 a.m.-5 p.m., at TMC Helix Park. Register here.

Dec. 9 — Energy in Action Seminar

The Energy Transition Institute hosts a monthly Energy in Action Seminar focused on the digitization of the global energy transition. This month's topic is "Exploring AI’s Impact on the Fuels & Petrochemicals Industry," featuring speaker Leo Chiang, Senior Director of Corporate Technology at The Lubrizol Corporation. The event includes a one-hour talk followed by an hour of networking.

This event is Dec. 9 from 4-6 pm at the University of Houston.

Dec. 9-10 — Energy LIVE 2025

Energy LIVE is Reuters Events' flagship conference and expo that brings the full energy ecosystem together under one roof in Houston to solve the industry's most urgent commercial and operational challenges. The event will feature 3,000-plus senior executives across three strategic stages, a showcase of 75-plus exhibitors, and six strategic content pillars.

This event is Dec. 9-10 at NRG Park. Register here.

Dec. 11-12 — Fundamentals of The Texas ERCOT Electric Power Market

This two-day seminar provides a comprehensive overview of the structure, function, and current status of the Texas ERCOT ISO. Attendees will gain an understanding of the dynamic Texas wholesale and retail competitive markets, and learn how these markets interface with ERCOT ISO energy auctions and ISO operations. This two-day event will also address the rapidly expanding new market opportunities in Texas renewables, distributed generation, demand response, and demand side management, and more.

This event is Dec. 11-12 at the Courtyard Marriott Houston near the Galleria. Register here.

Dec. 9-11 — AST Conference & Trade Show

The 18th Annual National Aboveground Storage Tank (AST) Conference & Trade Show is the premier event for professionals in storage tank and terminal operations. Join industry leaders and experts for a three-day conference providing regulatory updates, technical insights, hands-on learning, and networking opportunities.

This event is Dec. 9-12 at The Woodlands Waterway Marriott. Register here.

Houston scientists develop 'recharge-to-recycle' reactor for lithium-ion batteries

reduce, recharge, recycle

Engineers at Rice University have developed a cleaner, innovative process to turn end-of-life lithium-ion battery waste into new lithium feedstock.

The findings, recently published in the journal Joule, demonstrate how the team’s new “recharge-to-recycle” reactor recharges the battery’s waste cathode materials to coax out lithium ions into water. The team was then able to form high-purity lithium hydroxide, which was clean enough to feed directly back into battery manufacturing.

The study has major implications for the electric vehicle sector, which significantly contributes to the waste stream from end-of-life battery packs. Additionally, lithium tends to be expensive to mine and refine, and current recycling methods are energy- and chemical-intensive.

“Directly producing high-purity lithium hydroxide shortens the path back into new batteries,” Haotian Wang, associate professor of chemical and biomolecular engineering, co-corresponding author of the study and co-founder of Solidec, said in a news release. “That means fewer processing steps, lower waste and a more resilient supply chain.”

Sibani Lisa Biswal, chair of Rice’s Department of Chemical and Biomolecular Engineering and the William M. McCardell Professor in Chemical Engineering, also served as co-corresponding author on the study.

“We asked a basic question: If charging a battery pulls lithium out of a cathode, why not use that same reaction to recycle?” Biswal added in the release. “By pairing that chemistry with a compact electrochemical reactor, we can separate lithium cleanly and produce the exact salt manufacturers want.”

The new process also showed scalability, according to Rice. The engineers scaled the device to 20 square centimeters, then ran a 1,000-hour stability test and processed 57 grams of industrial black mass supplied by industry partner Houston-based TotalEnergies. The results produced lithium hydroxide that was more than 99 percent pure. It also maintained an average lithium recovery rate of nearly 90 percent over the 1,000-hour test, showing its durability. The process also worked across multiple battery chemistries, including lithium iron phosphate, lithium manganese oxide and nickel-manganese-cobalt variants.

Looking ahead, the team plans to scale the process and consider ways it can sustain high efficiency for greater lithium hydroxide concentrations.

“We’ve made lithium extraction cleaner and simpler,” Biswal added in the release. “Now we see the next bottleneck clearly. Tackle concentration, and you unlock even better sustainability.