Harvard University Physics Department

Generated by the use of fossil energy, respirable-sized particles pose a major threat to our environment and health. In this book the hypothesis that fossil fuels are the primary culprit is examined in detail, including the nature, generation, and transport of particulate air pollution.

This book describes the work of the second Harvard cyclotron during its 50 years of operation and includes references to about 500 publications and 40 student theses from the work. In its first 20 years, the cyclotron’s primary use was for nuclear physics, particularly for understanding the interaction between two nucleons. During the next 30 years, the emphasis switched to treating patients with proton radiotherapy.