Drive an Electric Vehicle
Driving an electric vehicle has the highest impact. Electric vehicles are the most environmentally friendly ones. By driving electric cars, you are saving 4.3 metric tons of carbon dioxide per year. It is also less expensive in the long run and requires less maintenance. Since it requires little fuel, there is much less emission and you can save a lot of money on fuel. Compared to fuel, electricity is much cheaper. It is the most efficient for short distance commute too.
Resources
Where your electricity comes from plays an integral role in efficiency. This chart breaks down electricity sources per state as well as the annual emissions for different types of vehicles.