"To forget how to dig the earth and tend the soil is to forget ourselves."
"There are no passengers on Spaceship Earth. We are all crew."
"Conservation is a state of harmony between men and land."
"Human activities are increasingly altering the Earth's climate.... It is virtually certain that increasing atmospheric concentrations of carbon dioxide and other greenhouse gases will cause global surface climate to be warmer. The unprecedented increases in greenhouse gas concentrations, together with other human influences on climate over the past century and those anticipated for the future, constitute a real basis for concern."
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