James Conca, Ph.D. Earth and environmental sciences. Jerry Cuttler, D.Sc. Nuclear science and engineering, John Dale Dunn, MD, JD: LNT assumes, in contrast to almost all data on living organisms, that any radiation is bad and there is no threshold of radioactivity below which there is no risk, even Earth background radiation levels. Following ALARA means that we should protect everyone from all radiation, making doses as low as we possibly can, even if it costs billions.
