Young Brunette Girl Outside In The Wild Nature

By the latter 19th century it had become clear that in many countries wild areas had either disappeared or were in danger of disappearing. This realisation gave rise to the conservation movement in the USA, partly through the efforts of writers and activists such as John Burroughs and John Muir, and politicians such as U.S. President Teddy Roosevelt.
National parks
The creation of National Parks, beginning in the 19th century, preserved some especially attractive and notable areas, but the pursuits of commerce, lifestyle, and recreation combined with increases in human population have continued to result in human modification of relatively untouched areas. Such human activity often negatively impacts native flora and fauna. As such, to better protect critical habitats and preserve low-impact recreational opportunities, legal concepts of "wilderness" were established in many countries, beginning with the United States .