Book excerpt: Racing Green is the story of how motorsport science has become smarter and more environmentally friendly, and how these developments on the track are changing the world. Motor racing is one of the world's most watched sports. In the United States alone, NASCAR has over 75 million fans and counting. It's also the most scientifically demanding sport on Earth, requiring a combination of peak physical and mental skill, world-class engineers and a constant drive for technological innovation. Racing Green explores the science that has been translated from racing to the road, from the early 19th century through to innovations such as electric cars and autonomous vehicles. The history of motor racing, both its glories and its tragedies, led to some of the most important modern developments we see in car design today. Just as the heartbreaking death of Dale Earnhardt at the Daytona 500 led NASCAR to introduce a new raceway barrier method, ideas pioneered during races – such as crush zones to crash helmets – have been incorporated into race car and track designs around the world. Cleaner technologies first trialed and improved in modern racing are also shaping our communities beyond the track, from the hidden aerodynamics in everything from your grocery aisle to Apple's new $5 billion headquarters to a Porsche made from flax and tires made from dandelions. Through exclusive interviews with NASCAR's Research and Development Center, Formula 1 insiders, engineers, scientists and drivers, lifelong motorsport fan Kit Chapman goes behind the scenes of the current breakthroughs to show where motorsport is likely to take us in the future, picking up extraordinary tales along the way, such as the Ohio State University's experimental electric car, the Buckeye Bullet, which broke the electric land speed record on the salt flats in Utah, hitting an astounding 340 mph, and the untold story of how motorsport used its unparalleled mechanical expertise to help during the COVID-19 pandemic. Racing Green is a mix of travelogue and historical retrospective, combining visits to the experts and discussing the science with retellings of real-life incidents that represent milestones in shaping the modern world