How and why did the Conservation Movement begin? (What makes the Progressive Era Conservation Movement different from environmentalism today?

Answer 1

http://www.loc.gov/teachers/classroommaterials/presentationsandactivities/presentations/timeline/progress/conserve/

http://en.wikipedia.org/wiki/Environmentalism

Answer 2

Off the top of my head, in the Progressive Era we/they did not have as much concern about pollution, greenhouse gasses, etc. The science wasn't there yet. The conservationists sought to conserve natural geographic areas, which we still do today, but modern environmentalism encompasses much more.

http://en.wikipedia.org/wiki/Conservation_movement

http://en.wikipedia.org/wiki/Environmentalism