"The aquifer [is] the water table people need to keep secure. Nature has this incredible system of water purification under the ground. Ground water is much better to drink than surface water because it filters out the bacteria that can cause all sorts of problems."

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Just as with other great words, the word environment means different things. You might say that a cave woman twenty thousand years ago sweeping out the cave was improving the environment. Many people improving the environment think only in terms of the air they breathe in their hometown and the water in the aquifer under their hometown. My guess is very few are thinking centuries ahead or thousand of years ahead, but that's what we have to do.

— Pete Seeger