← Chap 7 History of Environmental policy 2nd wave Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All National park system 1872. established first national park, yellowstone. protected land with unique features. National Forest System 1891. Created forest reserves that were off limits from logging Dust bowl soil conservation. 1930's. drought and poor farming led to severe soil erosion