seeing green

Houston launches Google-backed tool to address urban tree cover disparities

American Forests is aiming to assist with at least 100 cities to make progress on Tree Equity by 2030. Photo by Thomas Koenig/Big Pineapple Productions

The oldest national nonprofit conservation organization in the U.S American Forests has launched the Houston Tree Equity Score Analyzer, which was developed through local nonprofit Trees For Houston and local stakeholders from local government, environmental groups and the public health sector, and supported by Google’s philanthropic arm Google.org with a $450,000 grant.

To mark the launch, Trees For Houston and American Forest celebrated the partnership and worked to plant 50 trees at Shadydale Elementary in Northeast Houston on December 6.

“This marks a significant milestone for Houston's urban forestry efforts,” says Texas State Representative Senfronia Thompson at the December 6 event. “This effort goes beyond simply planting trees—it’s about creating the foundation for a greener, more inclusive future for our community. By uniting diverse resources and partners, including American Forests, Google.org and Trees For Houston, we’re showcasing a powerful dedication to enhancing the environmental well-being and quality of life in our urban areas.”

How the analyzer works is it provides auto-generated data on the impact of tree cover alongside demographic data, land use, poverty and other socioeconomic factors to assist with guide planning and investments to grow tree cover. The Houston Tree Equity Analyzer found that Shadydale Elementary has just 9 percent tree canopy coverage, which falls short of the 30 percent canopy goal for the area. The planting will increase the canopy by 6 percent according to a news release. According to American Forests, nearly 80 percent of urban neighborhoods in the United States have inadequate tree cover.

“The Tree Equity Score Analyzer enables communities to take a human-centered, data-driven approach to developing actionable tree planting and protection plans, ensuring they are focusing on areas that need them most, like Shadydale Elementary School,” said Vice President of GIS and Data Science at American Forests Chris David said in a news release.

American Forests is aiming to assist with at least 100 cities to make progress on Tree Equity by 2030. American Forests helped to unlock $1.5 billion, which was the nation’s largest federal investment in urban forestry in the Inflation Reduction Act of 2022.

“We look forward to working with our partners in Houston to continue to grow equitable tree cover in the community with data-driven approaches and action,” David says in a news release.

Photo by Thomas Koenig/Big Pineapple Productions

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A View From HETI

A team at the University of Houston is changing the game for sodium-ion batteries. Photo via Getty Images

A research lab at the University of Houston has developed a new type of material for sodium-ion batteries that could make them more efficient and boost their energy performance.

Led by Pieremanuele Canepa, Robert Welch assistant professor of electrical and computer engineering at UH, the Canepa Research Laboratory is working on a new material called sodium vanadium phosphate, which improves sodium-ion battery performance by increasing the energy density. Energy density is the amount of energy stored per kilogram, and the new material can do so by more than 15 percent. With a higher energy density of 458 watt-hours per kilogram — compared to the 396 watt-hours per kilogram in older sodium-ion batteries — this material brings sodium technology closer to competing with lithium-ion batteries, according to the researchers.

The Canepa Lab used theoretical expertise and computational methods to discover new materials and molecules to help advance clean energy technologies. The team at UH worked with the research groups headed by French researchers Christian Masquelier and Laurence Croguennec from the Laboratoire de Reáctivité et de Chimie des Solides, which is a CNRS laboratory part of the Université de Picardie Jules Verne, in Amiens France, and the Institut de Chimie de la Matière Condensée de Bordeaux, Université de Bordeaux, Bordeaux, France for the experimental work on the project.

The researchers then created a battery prototype using the new materia sodium vanadium phosphate, which demonstrated energy storage improvements. The material is part of a group called “Na superionic conductors” or NaSICONs, which is made to let sodium ions move in and out of the battery during charging and discharging.

“The continuous voltage change is a key feature,” Canepa says in a news release. “It means the battery can perform more efficiently without compromising the electrode stability. That’s a game-changer for sodium-ion technology.”

The synthesis method used to create sodium vanadium phosphate may be applied to other materials with similar chemistries, which could create new opportunities for advanced energy storage. A paper of this work was published in the journal Nature Materials.

"Our goal is to find clean, sustainable solutions for energy storage," Canepa adds. "This material shows that sodium-ion batteries can meet the high-energy demands of modern technology while being cost-effective and environmentally friendly."

Pieremanuele Canepa, Robert Welch assistant professor of electrical and computer engineering at UH, is leading a research project that can change the effectiveness of sodium-ion batteries. Photo courtesy of UH

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