If you're looking for a great way to lower your carbon footprint, then maybe you shouldn't look past your own vehicle.  We all take for granted the ease of traveling to and fro during our days, so why not consider taking on a newer, better way to travel? Say hello to the Toyota Prius.  We know she's not the sexy Mustang you had your heart on, but you'll be filling up the tank a heck of a lot less. Capable of 72.4 mpg, the Prius has just...