Michael McCullough is studying sustainable development, environmental management and politics at the University of Pennsylvania. He has a special interest in natural resource economics and resource management. Michael also is a staff writer for Oikos International's StudentReporter.org. He helped lead a team of student reporters from around the world at the Rio+20 conference in Brazil. Michael served as member of US Senator Robert Casey's staff and later worked with clean technology and alternative energy companies at a Washington, DC lobbying firm.