One of the most impactful ways to reduce your carbon footprint is one of the most difficult: giving up your car. Of course, this is not something everyone can do — access to reliable transportation can facilitate better jobs for many people, and plenty of homes aren't within walking or cycling distance of offices or schools.
But if a car-free life is feasible for you, it's one of the best ways to reduce your greenhouse-gas emissions. According to a 2017 article published in the journal Environmental Research Letters, that change could reduce your annual carbon footprint by 2.4 metric tons.