From Summer 1991 Explore This Issue Population Growth and Environmental Security By Anne H. Ehrlich Paul R. Ehrlich From the Summer 1991 Issue ← Under the Umbrella (on Landscape at the End of the Century by Stephen Dunn; World without End by Dan Masterson; Permanent Change by John Skoyles; Raised Underground by Renate Wood; & After by Ann Douglas) → Sand and Blue-Green Algae
