The quotation is by Teddy Roosevelt. It is said that "Of all Roosevelt's achievements, he was proudest of his work in the conservation of natural resources and extending federal protection to land and wildlife" As well: "Roosevelt established the United States Forest Service, signed into law the creation of five National Parks, and signed the 1906 Antiquities Act, under which he proclaimed 18 new U.S. National Monuments. He also established the first 51 bird reserves, four game preserves, and 150 National Forests. The area of the United States that he placed under public protection totals approximately 230 million acres (930,000 square kilometers)." (Wikipedia)