Examined are the environmental attitudes of United States high school senior classes of 1976-1979. Multi-item indices of concern about pollution, overpopulation, energy conservation, other people, and the importance of material things were administered to about 17,000 students in approximately 130 high schools each year. The four classes of seniors are similar in their environmental views. The only exceptions are a small increase in the importance of money and material possessions, slightly lower support in the class of 1979 for pollution control and concern for others, and slightly lower support for population planning in 1978 and 1979. Correlations among the indices were low, both for the full sample and for selected subsamples. (Author/WB)