sentences:  In the late 19th century, the nation grew concerned about the abuse of its forest resources, and their protection and management became a politically popular issue.Gifford Pinchot, the "father of American forestry" and one of Theodore Roosevelt's chief advisors, promoted the concept of wise use and sustained yield of forests.In the year 1900, Pinchot selected sixty-one young men to participate in forestry training and sent them out in groups around the country to collect forest data for twenty-five dollars a month.