Green Clay Tennis Courts Could Slash Carbon Emissions—Here’s How

Can a simple change in tennis court surfaces help combat climate change? While it won’t single-handedly save the world, a new study published in Applied Geochemistry suggests that replacing all tennis courts with green clay could make a meaningful difference in reducing carbon emissions.

The research, co-authored by Frankie Pavia and Jonathan Lambert, models the carbon footprint of different tennis court surfaces by evaluating transportation, construction, and maintenance. Compared to hard courts—the most common surface in the U.S.—green clay courts generate 1.6 to 3 times lower carbon emissions during construction.

Beyond construction, green clay courts continue to benefit the environment by actively removing carbon dioxide from the atmosphere. The clay material reacts with water and air, absorbing CO2 and eventually achieving a net-negative carbon footprint over time.

From Tennis Partners to Climate Researchers

The study’s authors didn’t initially set out to merge their passion for Earth science with tennis. Their collaboration began as graduate students at Columbia University, where they frequently traveled between the Manhattan campus and the Earth sciences facilities in the New Jersey Palisades.

During their commutes, they often stopped at Riverbank State Park in Manhattan, where they discovered a green clay tennis court. This led to a consistent doubles crew forming, bonding over their shared interest in tennis. Little did they know that their casual games would inspire groundbreaking research on climate mitigation.

How Green Clay Courts Fight Climate Change

The key to green clay’s environmental benefits lies in its chemical composition. The study highlights enhanced rock weathering—a carbon dioxide removal technique where rocks absorb CO2 from the atmosphere and store it in a stable form for millennia.

Green clay courts leverage this natural process. Unlike hard courts, which require energy-intensive materials like concrete and acrylic, green clay courts rely on natural clay that continuously interacts with the environment to sequester carbon. This makes them a rare example of a sports infrastructure that actively contributes to climate solutions.

Why This Matters for the Future of Tennis

Tennis is a global sport with millions of courts worldwide. If even a fraction of these were converted to green clay, the cumulative reduction in carbon emissions could be substantial. The study underscores the potential of integrating climate-friendly solutions into everyday infrastructure, proving that small changes can lead to significant environmental benefits.

While the authors acknowledge that replacing all tennis courts isn’t a silver bullet for climate change, their research highlights an overlooked opportunity to merge sports and sustainability. As Pavia and Lambert’s work demonstrates, sometimes the most impactful solutions come from the most unexpected places—like a doubles match on a green clay court.