California now has more trees than at any time since the late Pleistocene. This green landscape, however, is not the work of nature. It’s the work of history. In the years after the Gold Rush, American settlers remade the California landscape, harnessing nature to their vision of the good life. Horticulturists, boosters, and civic reformers began to "improve" the bare, brown countryside, planting millions of trees to create groves, wooded suburbs, and landscaped cities.
"Wonderful natural and socioeconomic history"