Two 18-year-olds from Pennsylvania, Rohan Kapoor and Jack Reichert, developed a tailpipe filter called the Go Green Filter that uses living microalgae, water, and light to convert exhaust gases into oxygen. The prototype costs about $50 to manufacture and reportedly reduced vehicle emissions by 74% in testing. The teens say if fitted worldwide, it could cut global carbon emissions by over 16%, though that figure is theoretical. The filter is one of several technologies aimed at making internal combustion engines cleaner as automakers shift to smaller turbo engines, hybrids, and EVs. Mazda, BMW, Toyota, and Lamborghini are also exploring carbon capture and synthetic fuels. The Go Green Filter stands out for its low cost and use of biological rather than mechanical filtration.
