Dr. Kartik Chandran is a Professor at Columbia University, focusing on Environmental Engineering, Microbiology, and Microbial Ecology. He directs the Wastewater Treatment and Climate Change Program and the Biomolecular Environmental Sciences Program at Columbia. His research explores re- engineering the nitrogen cycle and its connection to water, energy, and carbon cycles, with a strong emphasis on wastewater, sanitation, and climate issues. His work aims to reduce greenhouse gas emissions and improve water quality. Recognized globally for his research, Dr. Chandran was named a MacArthur Foundation Fellow in 2015, highlighting his innovative work in environmental biotechnology and biological nitrogen removal. His publications address sustainable solutions for global environmental challenges.