Radioactivity and Air Dose Rate （2014） ＱWhat are radiation and radioactivity? What are their effects on our health and how can we prevent them? ＡRadiation is particles and electromagnetic waves emitted by radioactive materials. Radioactivity is the ability to emit radiation. The basics of radiation are available at the following sites. Please access them for introductory information. JAEA’ “Q&A Session on Radiation”https://fukushima.jaea.go.jp/communication/ Example of presentation material for the Q&A Session on Radiation（pdf） Fig.1 Example of presentation material 1: Radiation and radioactivity Fig.2 Example of presentation material 2: Deterministic effect and stochastic effect prev next Related articles Where were radioactive materials deposited and in what quantities? What kinds of radioactive materials were released into the atmosphere and the sea and how much? In what ways does exposure to radiation occur the environment? What kinds of radiation exposures are important in Fukushima?