автор: Randy D. Down

RANDY D. DOWN, PE, is a recognized expert in environmental instrumentation and controls with Forensic Analysis and Engineering Corp. His more than thirty years of instrumentation and controls experience covers a wide range of industries and applications. JAY H. LEHR, PHD, is the Science Director of The Heartland Institute and Senior Scientist at Bennett & Williams, Inc. He is the author of fourteen books and over 500 articles on environmental science.