1. The Father of a Modern Movement

In many ways, being green has never been easier, especially for politicians. The vast majority of Americans now say environmental protection is important to them, and few would vote for a leader who explicitly claims to be "anti-environment."

But America's highest office has long had a relationship to the planet that is anything but straightforward. Given enormous social, economic and political changes in our nation's history, ranking presidents on green criteria is no easy task. This list couldn't possibly reflect all the issues involved, but it is a subjective look at highlights in the evolution of environmental policy and protection.

To begin, when most Americans think of green presidents, they probably envision Theodore Roosevelt (1901-1909). "TR" consistently lobbied Congress for wilderness protection, used the Forest Reserve Act of 1891 to set aside 150 million acres of timberland as public domains, and oversaw creation of the U.S. Forest Service. Roosevelt also created 50 wildlife refuges and five national parks.

Beyond those accomplishments, TR is well remembered as popularizing the ideas of good resource stewardship and respect for nature. That's not to say everything was idyllic in those years of heavy logging, mining, urbanization and rapid human expansion, but seeds of consciousness were sown.