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result of Theodore Roosevelt’s philosophy about conservation was the regulation of the drug industry. the creation of new railroads. the creation of national parks. the regulation of the food industry.

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liamklec181
the creation of national parks. 

I believe the answer is: The creation of national parks

Due to the conservation regulation from Theodore Roosevelt, The united states government founded 230 million acres of public lands that are resided for the creation of national parks. This parks were created to protect various forms of plants, animals, and natural resources reserves.