This course studies the physical and chemical properties of the Earth's atmosphere and their impact on humankind. The structure and dynamics of the troposphere, stratosphere, and ionosphere are examined. Elements of cloud formation, air masses, air pollution, and weather forecasting are reviewed. Methods for classifying and analyzing the world's climatic regions are discussed. The environmental hazards of tornadoes, chinook winds, monsoons, green house gases, and hurricanes, among others, are reviewed. Principles of scientific inquiry are integrated throughout the course.