Whether you’re sticking to your New Year’s resolution to live a greener lifestyle or you’re tired of sitting in traffic during your morning commute, you’ve probably wondered once or twice in your life if riding a bike is more eco-friendly than driving a car. And, surprisingly, it’s a bit of a tricky question to answer. But once you’re armed with all the necessary facts and figures, you’ll be happy to know that two wheels is certainly a greener mode of transportation than anything with four.