Conquering any difficulty always gives one a secret joy, for it means pushing back a boundary-line and adding to one's liberty.
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Nationality: Swiss Type: Philosopher Born: September 27, 1821 Death: 1881 |
Humans have changed ecosystems more rapidly and extensively than in any comparable period of time in human history, largely to meet rapidly growing demands for food, fresh water, timber, fiber and fuel. This has resulted in a substantial and largely irreversible loss in the diversity of life on Eart

