Atkins, P.W.: Molecules, Scientific American Library, New York, 1987. A delightful journey among the molecules most familiar to us.

Cox, T.: "Origin of the Chemical Elements," New Scientist, February 3, 1990, pages 1–4. The heavier elements making up most of the earth—and us—were created by the birth and death of generations of stars.

Gorham, E.: "Atmospheric Chemistry: Neutralizing Acid Rain," Nature, vol. 367, January 27, 1994, page321. A brief discussion of the unanticipated "extras" that contribute to acid rain.

Mertz, W.: "The Essential Trace Elements," Science, vol. 213, 1981, pages 1332–38. An account of the roles of rare elements in human metabolism and the effects of their absences.

Morrison, P. and P. Morrison: Powers of Ten, Scientific American Library, New York, 1982. A pictorial atlas explaining the macrocosm to microcosm.

Raven, P.R., L.R. Berg, and G.B. Johnson: Environment, ed. 2, Saunders College Publishing, Fort Worth, 1995. A user-friendly text on environmental biology, with a particularly lucid discussion of acid precipitation.

Tyson, J.L.: "Scientists to Turn High Beam on Molecules," Christian Science Monitor, March 2, 1994, page14. A very readable discussion of the Advanced Photon Source project underway at the Argonne National Laboratory.

Weinberg, S.: The Discovery of Subatomic Particles, Scientific American Library, New York, 1983. Documents the discovery of subatomic particles and introduces the nontechnical reader to the fundamentals of classic physics.