School of Sciences, UNAM is one of the 10 most active herbaria in the world. The Faculty of Sciences offers graduate programs on computer science, material science, astronomy, biology, earth science, ocean science, physics, mathematics, statistics & actuarial science, history and philosophy of science and science education, although most of these are run in collaboration with the nearby institutes, like Physics, Mathematics and IIMAS (Institute for applied mathematics and systems). Some programs are offered in conjunction with other faculties and institutes nationwide. School of Sciences, UNAM The Faculty of Sciences () at the National Autonomous University of Mexico (UNAM) is the entity where natural
Enrique Leff etc. Enrique Leff Enrique Leff (born Mexico, 1946) is a Mexican economist, who defines himself today as an environmental sociologist and environmentalist. He has written 25 books and 180 articles on political ecology, environmental sociology, environmental economics, environmental epistemology and environmental education. He is regarded as one of the key environmental thinkers in Latin America. After a degree in chemical engineering from UNAM (Universidad Nacional Autónoma de México) in 1968. Leff graduated with a Doctorat de Troisième Cycle in development economics from the École Pratique des Hautes Études, Paris, in 1975. Leff lectured at UNAM (Universidad Nacional Autónoma de México)