The next occupant of the Oval Office should continue the legacies of Presidents Lincoln, Nixon, Carter and Teddy and Franklin Roosevelt through sound environmental policies.

While the current candidates might not have had any great examples to follow the past few years, these three Republicans and two Democrats did a lot for the environment and furthering sustainable energy polcies. Here are the 5 most eco-friendly presidents in chronological order.

Abraham Lincoln: established the U.S. Department of Agriculture (USDA)

Teddy Roosevelt: set up the National Wildlife Refuge and passed many conservation laws

Franklin Roosevelt: established the Civilian Conservation Corps (CCC)

Richard Nixon: Signed the Clean Air Act and established the EPA

Jimmy Carter: signed the National Energy Act and several laws to protect the wilderness of Alaska.

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