Projects shall be directed toward providing opportunities to the public for their education or the use of these natural resources and environmentally important public lands and waters, while at the same time providing young men and women with an opportunity for personal development in a variety of basic skills. Projects shall be undertaken in both urban and rural areas and shall be selected on the basis of the environmental and natural resource benefits each offers, the opportunities for public education or use each offers, and the on-the-job training value of each.