"Certainly humans can be destructive and shortsighted; they can also be forward-thinking and altruistic. Time and time again, people have demonstrated that they care about what Rachel Carson called "the problem of sharing our earth with other creatures," and that they're willing to make sacrifices on those creatures' behalf. Alfred Newton described the slaughter that was occurring along the British coast; the result was the Act for the Preservation of Sea Birds. John Muir wrote about the damage being done in the mountains of California, and this led to the creation of Yosemite National Park. Silent Spring exposed the dangers posed by synthetic pesticides, and within a decade, most uses of DDT had been prohibited."