Know of any classic eco-texts?

Looking to re-energize your environmentalist soul? Here are two classic reads that are sure to replenish that eco-karma.

Signs & Seasons is a collection of essays by the eminently readable 19th-c. naturalist and friend of Teddy Roosevelt, John Burroughs. A native of the Catskill region, Burroughs encourages readers to take a good, hard look around. Wherever you are, he suggests, is right where you should be:

[The lover of nature] has only to stay home and see the procession pass. The great globe swings around to him like a revolving showcase; the change of the seasons is like the passage of strange and new countries; the zones of the earth, with all their beauties and marvels, pass one's door, and linger long in the passing. ("A Sharp Lookout")

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If you've ever thought of ducking out of civilized society and shacking up in a single-room cabin to grow your own beans, it might be high time you read Walden; or, Life in the Woods, by America's first hippie.

You only need sit still long enough in some attractive spot in the woods that all its inhabitants may exhibit themselves to you by turns. (from the chapter, "Brute Neighbors")