The International Master 2 "Atmospheric Environment" of Lille 1 University is providing a 1-year program in physics and chemistry of the atmosphere at the highest level. It is supported by the French Laboratory of Excellence CaPPA (Chemical and Physical Properties of the Atmosphere). Training is dedicated to students in physics and chemistry having validated 4 years of study (Master 1st year / Bachelor / 240 ECTS-credits), wishing to follow a specialization in atmospheric sciences to get a strong background in theory and practical works. Students are immersed in an international environment and all courses are delivered in english. The first semester (Sept-Jan) is dedicated to lectures/practical works, and the second semester (Feb-Jul) is a full-time research training in Laboratory