Being environmentally conscious is seeping into every aspect of consumer culture. From the food we eat to the clothes we wear; more and more people are looking to make more eco-friendly choices and consider the environmental consequences of their purchases. When it comes to leasing a vehicle, there is no exception. Cars vary widely when it comes to emissions and their impact on the planet. So, for those of us who want to make a more environmentally sound choice when we choose a car to lease, here are the top five most eco-friendly cars to choose from.