The Environmental Science and Engineering (ESE) graduate program at Caltech's Division of Geological and Planetary Sciences is designed primarily for students pursuing a Ph.D. The program provides broad interdisciplinary training, combining environmental science, engineering, earth science, chemistry, and related fields. Research spans the Earth's atmosphere, oceans, and biosphere, with a curriculum emphasizing core knowledge and specialized electives. A master’s degree may be awarded en route to the Ph.D. or in special cases, but all students are admitted initially for the doctoral track. 来源： https://ese.caltech.edu/academics/apply