You see a highway full of trucks when you drive on the interstate. Celine King see the future of environmental accountability. “When I encounter a truck on the road, I envision a sticker on their bumper that reads ‘Emissions Tracked by GreenIRR,’” King told her alma mater's news outlet. King is the founder and CEO of GreenIRR, the newest portfolio company of Brown and White Ventures. King launched the climate tech company in 2022, during her senior year at Fairfield University. GreenIRR's ambitious goal: to help reduce emissions from the trucking industry—one of the largest contributors to climate pollution in the United States. Transportation accounts for roughly 90 percent of emissions in the U.S. transportation sector, and heavy-duty trucks generate nearly three-quarters of that total. For King, the scale of the challenge became the inspiration for a business designed to give freight carriers a clearer picture of their environmental impact. “My inspiration was to find a way to help trucking companies gain some control over their emissions,” she said. GreenIRR’s platform offers a software-as-a-service carbon accounting system that automatically measures fleet emissions and generates regulatory-compliant reports. Before GreenIRR, many trucking companies tracked emissions through spreadsheets and manual data entry—a process that could take up to 40 hours and was prone to errors. By automating the process, King hopes to help companies improve both efficiency and environmental performance. The company has continued to expand its technological capabilities. GreenIRR recently secured a patent for its technology, which integrates freight telematics and fuel card data to create what King describes as “machine-grade” emissions tracking. “GreenIRR was built on the belief that you can’t improve what you’re not measuring,” King said. “If supply chains are going to make better decisions—on cost, performance, and environmental impact—the underlying data has to be real, defensible and auditable.” According to King, GreenIRR is the first supply chain platform built on primary data from telematics and fuel cards with third-party assurance on its emissions reporting. In an industry where estimates and self-reported spreadsheets have long been the norm, the company aims to create a more reliable data standard. King’s path to climate entrepreneurship began unexpectedly at Fairfield. Raised near Philadelphia, Pennsylvania, she originally enrolled as a biology major on a pre-veterinary track before discovering climate policy and environmental ethics courses during her sophomore year. Her classwork sparked what King described as a “visceral reaction,” prompting her to pursue a career focused on climate solutions. She later graduated with a double major in business analytics and biology. Hands-on experience also shaped her trajectory. King interned with the National Oceanic and Atmospheric Administration at the University of Connecticut’s Coastal Biogeochemical Dynamics Lab and later worked at renewable energy investor Greenbacker Capital. Today, GreenIRR operates with a growing team and works from Brooklyn Navy Yard Labs in New York. For King, the mission remains clear: bring modern data tools to a legacy industry and help freight companies make decisions that are better for both business and the planet. “We didn’t set out to follow the market,” King said. “We set out to build it.”