P.J. Popovic, CEO of Houston-based Rhythm, explains Renewable Energy Certificates work and their impact on Texas. Photo courtesy of Rhythm

We all know what renewable energy is — wind, solar, biomass, geothermal, hydropower — but how do you purchase it? It's invisible. Not to mention when energy from any source enters the electricity grid, there's no way to track all those electrons.

Renewable Energy Certificates have made it possible

Renewable Energy Certificates, or RECs, allow us to track your clean energy. Each individual REC represents one megawatt-hour of clean energy generated. And while a REC isn't technically electricity, it represents the clean energy going into the electricity grid—meaning homes and businesses claim their commitment to renewable energy if their electricity is supported by RECs.

It's also important to understand what a renewable energy certificate is not: an offset. An offset represents a metric ton of emissions avoided and a REC represents 1 MWh of clean energy generated. While each have similar goals, they are not quite the same thing.

Not all RECs are created equally

The market for RECs is fluid. Due to the growth of the renewable energy market, RECs have been oversupplied for years. This has created low prices and little-to-no financial advantage for the facilities that generate clean electricity (e.g., wind facilities, solar farms, hydro plants).

In Texas, the retail electricity market is inundated with renewable electricity claims said to be supported by RECs. The energy plan you sign up for might come from solar, wind, biomass, or even trash incineration, but the renewable energy facilities likely are coming from outside Texas, located in places like California, Canada, or elsewhere. While there's no wrong way to switch to renewable energy, supporting renewable energy sources inside Texas helps Texans move closer to being a more sustainable state.

Choosing Texas renewable energy plans and your actions do have a true, real-world impact more than ever before

Some critics have argued that REC-supported renewable energy plans don't meet the highest standard of sustainability arguing RECs are not foundational to the existence of renewable energy assets. In other words, they argue that RECs don't provide a material revenue source for renewable projects because they don't incentivize new developments of renewable facilities to be built.

When RECs were trading for less than a dollar, this was a valid argument. But that was then, and this is now.

In the last year alone, voluntary renewable energy certificate prices have skyrocketed and are now between $7 and $10 per MWh. This means RECs can now contribute up to 30 percent of a renewable facility's revenue. Naturally, this encourages more and more clean-energy facilities and clean-energy jobs to be created. A win-win.

What about Power Purchase Agreements?

A Power Purchase Agreement, or PPA, is a tad different than a REC. In a PPA, the developer of a renewable project (solar arrays at a solar farm, or turbines at a wind farm) can sell the actual energy it produces over a 10-to-20-year contract.

While the sale of this renewable energy still contributes to a larger portion of project revenues, the revenue mix has clearly shifted, and RECs cannot be considered an immaterial incentive anymore. Sure, PPAs are a stronger market signal for renewable project development, but only a couple of hundred organizations globally utilize PPAs. This makes them very challenging for businesses to access.

Through PPAs, various risks, credit needs, and long-term commitments create challenges for many organizations to meet their sustainability goals. So, while RECs do not provide as material of a market signal as PPAs, with the recent changes in market prices, RECs can now be considered a meaningful, profitable market signal for renewable projects.

Making the future of renewable energy in Texas even brighter.

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P.J. Popovic is the CEO of Houston-based Rhythm.

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Astros and Rockets launch new streaming service for Houston sports fans

Sports Talk

Houston sports fans now have a way to watch their favorite teams without a cable or satellite subscription. Launched December 3, the Space City Home Network’s SCHN+ service allows consumers to watch the Houston Astros and Houston Rockets via iOS, Apple TV, Android, Amazon Fire TV, or web browser.

A subscription to SCHN+ allows sports fans to watch all Astros and Rockets games, as well as behind-the-scenes features and other on-demand content. It’s priced at $19.99 per month or $199.99 annually (plus tax). People who watch Space City Network Network via their existing cable or satellite service will be able to access SCHN+ at no additional charge.

As the Houston Chronicle notes, the Astros and Rockets were the only MLB and NBA teams not to offer a direct-to-consumer streaming option.

“We’re thrilled to offer another great option to ensure fans have access to watch games, and the SCHN+ streaming app makes it easier than ever to cheer on the Rockets,” Rockets alternate governor Patrick Fertitta said in a statement.

“Providing fans with a convenient way to watch their favorite teams, along with our network’s award-winning programming, was an essential addition. This season feels special, and we’re committed to exploring new ways to elevate our broadcasts for Rockets fans to enjoy.”

Astros owner Jim Crane echoed Feritta’s comments, adding, “Providing fans options on how they view our games is important as we continue to grow the game – we want to make it accessible to as large an audience as possible. We are looking forward to the 2026 season and more Astros fans watching our players compete for another championship.”

SCHN+ is available to customers in Texas; Louisiana; Arkansas; Oklahoma; and the following counties in New Mexico: Dona Ana, Eddy, Lea, Chaves, Roosevelt, Curry, Quay, Union, and Debaca. Fans outside these areas will need to subscribe to the NBA and MLB out-of-market services.

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This article originally appeared on CultureMap.com.

Rice University researchers unveil new model that could sharpen MRI scans

MRI innovation

Researchers at Rice University, in collaboration with Oak Ridge National Laboratory, have developed a new model that could lead to sharper imaging and safer diagnostics using magnetic resonance imaging, or MRI.

In a study recently published in The Journal of Chemical Physics, the team of researchers showed how they used the Fokker-Planck equation to better understand how water molecules respond to contrast agents in a process known as “relaxation.” Previous models only approximated how water molecules relaxed around contrasting agents. However, through this new model, known as the NMR eigenmodes framework, the research team has uncovered the “full physical equations” to explain the process.

“The concept is similar to how a musical chord consists of many notes,” Thiago Pinheiro, the study’s first author, a Rice doctoral graduate in chemical and biomolecular engineering and postdoctoral researcher in the chemical sciences division at Oak Ridge National Laboratory, said in a news release. “Previous models only captured one or two notes, while ours picks up the full harmony.”

According to Rice, the findings could lead to the development and application of new contrast agents for clearer MRIs in medicine and materials science. Beyond MRIs, the NMR relaxation method could also be applied to other areas like battery design and subsurface fluid flow.

“In the present paper, we developed a comprehensive theory to interpret those previous molecular dynamics simulations and experimental findings,” Dilipkumar Asthagiri, a senior computational biomedical scientist in the National Center for Computational Sciences at Oak Ridge National Laboratory, said in the release. ”The theory, however, is general and can be used to understand NMR relaxation in liquids broadly.”

The team has also made its code available as open source to encourage its adoption and further development by the broader scientific community.

“By better modeling the physics of nuclear magnetic resonance relaxation in liquids, we gain a tool that doesn’t just predict but also explains the phenomenon,” Walter Chapman, a professor of chemical and biomolecular engineering at Rice, added in the release. “That is crucial when lives and technologies depend on accurate scientific understanding.”

The study was backed by The Ken Kennedy Institute, Rice Creative Ventures Fund, Robert A. Welch Foundation and Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory.

Luxury transportation startup connects Houston with Austin and San Antonio

On The Road Again

Houston business and leisure travelers have a luxe new way to hop between Texas cities. Transportation startup Shutto has launched luxury van service connecting San Antonio, Austin, and Houston, offering travelers a comfortable alternative to flying or long-haul rideshare.

Bookings are now available Monday through Saturday with departure times in the morning and evening. One-way fares range from $47-$87, putting Shutto in a similar lane to Dallas-based Vonlane, which also offers routes from Houston to Austin and San Antonio.

Shutto enters the market at a time when highway congestion is a hotter topic than ever. With high-speed rail still years in the future, its model aims to provide fast, predictable service at commuter prices.

The startup touts an on-time departure guarantee and a relaxed, intimate ride. Only 12 passengers fit inside each Mercedes Sprinter van, equipped with Wi-Fi and leather seating. And each route includes a pit stop at roadside favorite Buc-ee's.

In announcing the launch, founder and CEO Alberto Salcedo called the company a new category in Texas mobility.

“We are bringing true disruptive mobility to Texas: faster and more convenient than flying (no security lines, no delays), more comfortable and exclusive than the bus or train, and up to 70 percent cheaper than private transfers or Uber Black,” Salcedo said in a release.

“Whether you’re commuting for business, visiting family, exploring Texas wineries, or doing a taco tour in San Antonio, Shutto makes traveling between these cities as easy and affordable as riding inside the city."

Beyond the scheduled routes, Shutto offers private, customizable trips anywhere in the country, a service it expects will appeal to corporate retreat planners, party planners, and tourists alike.

In Houston, the service picks up and drops off near the Galleria at the Foam Coffee & Kitchen parking lot, 5819 Richmond Ave.. In San Antonio, it is located at La Panadería Bakery’s parking lot at 8305 Broadway. In Austin, the location is the Pershing East Café parking lot at 2501 E. Fifth St.

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This article originally appeared on CultureMap.com.