did he do any significant work on conservation?
He was active in expanding, funding, and promoting the National Park and National Forest systems.
Franklin D. Roosevelt
Roosevelt was active in expanding, funding, and promoting the National Park and National Forest systems. 
who is frank fetter? An  American economist of the Austrian School. where was he born? Peru, Indiana can you name any educational institution that he attended? Indiana University did he work in any other place apart from the institution mentioned already? Stanford University how was he received in the academic circle? He was a staunch opponent of Franklin D. Roosevelt's plan to end the gold standard and worked with other economists in lobbying against the move to a fiat currency. who was the person that you just mentioned? American politician who served as the 32nd president of the United States whom did he marry? Eleanor Roosevelt
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Franklin D. Roosevelt [SEP] Conservation and the environment
Roosevelt had a lifelong interest in the environment and conservation starting with his youthful interest in forestry on his family estate. Although Roosevelt was never an outdoorsman or sportsman on Theodore Roosevelt's scale, his growth of the national systems were comparable. Roosevelt was active in expanding, funding, and promoting the National Park and National Forest systems. Under Roosevelt, their popularity soared, from three million visitors a year at the start of the decade to 15.5 million in 1939. The Civilian Conservation Corps enrolled 3.4 million young men and built of trails, planted two billion trees, and upgraded of dirt roads.