Modern vehicles and the internal combustion engines that power them — well, most of them, that is — have come a long way in recent decades. From inefficient carburetor systems to fuel injection and, now, hybrids, our cars are more eco-friendly than ever. We have modern emissions control systems to thank for many of those improvements, like cleaner air and better gas mileage. However, not everyone is a fan of emissions control systems, while others just don’t understand what
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