A Killing Rain: The Global Threat of Acid Precipitation by Thomas Pawlick (Sierra Club Books (San Francisco]; 206 pp.; $14.95) - The Primary Source: Tropical Forests and Our Future by Norman Myers (W. W. Norton & Co.; 399 pp.; $17.95)

A Killing Rain: The Global Threat of Acid Precipitation by Thomas Pawlick (Sierra Club Books (San Francisco]; 206 pp.; $14.95) - The Primary Source: Tropical Forests and Our Future by Norman Myers (W. W. Norton & Co.; 399 pp.; $17.95) - Volume 28 Issue 7