Atmospheric chemistry and global change are in the news: stratospheric ozone depletion, acid rain, climate change, photochemical smog, global-scale air pollution, etc. This module covers the fundamental chemical principles and processes involving gases and particles in Earth's changing atmosphere. It comprises lectures, problem solving classes, practical and computing labs, seminars as well as a field trip to UEA's own atmospheric observatory in Weybourne/North Norfolk. Reasonable numeracy and familiarity with basic chemical concepts are required.