When you think of motorsport, you probably don’t associate it with being environmentally aware. But there are actually racing series that take the concept of reducing carbon emissions quite seriously. Obviously, there’s Formula E, which races electric cars powered by biofuels. But well before Formula E was a thing, there was the American Le Mans Series. Back in 2008, the series partnered with SAE International, the US Department of Energy, and the Environmental Protection Agency to create the Green Racing Challenge, a race-within-a-race that looked at energy consumption and carbon emissions as well as sheer lap time to determine who went the farthest, fastest, and most cleanly.
The program survived the 2013 merger between the ALMS and another series, Grand-Am, but sadly came to an end of sorts in 2016 when the series aligned itself with a Le Mans rulebook that mandated E20 rather than cellulosic E85