Particle toxicology is the field concerned with the toxicity of particles and fibers. The characteristics of different particles are investigated to determine their levels of toxicity and the pathobiological mechanism of that lethality. This enables the assessment of risks relative to exposures and the development of interventions to prevent progression. Historically, coal, quartz, asbestos, glass fibres and environmental particles have had a negative impact on human health. In the era of nanotechnology, nanotoxicology has emerged as a new domain in particle toxicology. Of all possible hazards, inhalation exposure presents the most concern with researches showing pulmonary conditions such as fibrosis, inflammation and carcinogenicity being the most likely outcomes of exposure to nanomaterials. Ingestion exposure and skin contact are the other major concerns. This book elucidates new techniques and applications of particle toxicology in a multidisciplinary manner. It explores all the important aspects of particle toxicology in the present day scenario. It will prove to be immensely beneficial to students and researchers in this field.