An introduction to Earth system science intended for students pursuing the Earth and environmental sciences major and others with good high school math and science preparation. Earth system science integrates chemistry, physics, biology and geology to understand the Earth as an integrated planetary whole. The course will focus on the four major earth systems: land, water, air, and life and how their interactions determine past, current and future global changes. Required laboratory sections will meet every other week and include a combination of lab and field exercises. In fall of 2020 the course will be held in a hybrid format with a mix of primarily in-person meetings, including lab and field exercises, and to a lesser extent online discussions/activities when most appropriate.