The Hebrew University of Jerusalem is consistently ranked as the top university in Israel and among the top 100 worldwide. Its student body numbers 23,500 students from Israel and 90 other countries. The University is actively engaged in international cooperation for research and teaching and joint projects with 320 other universities, and more than 208 student exchange programs with 95 academic institutions in 27 countries. The Hebrew University is a leader in bringing about change in the global community in many fields, including science, economics, agriculture, environmental quality and public health. Students carry out advanced studies at the University and return to their home countries where they apply the knowledge they gained to improve the lives of their local communities.