As a part of the teaching and learning activities for Faculty Expertise Subjects (MKKF), namely Application, Mathematics, Science, Technology and Engineering (AMSTR) course, FPMIPA held a public lecture with Parid Ridwanuddin, S.Phil., M.A., M.Ud. as speaker. As a lecturer at Paramadina University who is also a researcher on trade & climate issues at Indonesia for Global Justice (IGJ), he explained ecological and energy problems and our contributions in solving these problems. By understanding real-world problems directly from experts in the field, students and FPMIPA’s faculties are expected to understand their role as problem-solvers for the nation’s problems.