Dr. Rojas-Rueda is at the forefront of merging environmental health, justice, and equity into a cohesive research agenda that spans Colorado, the United States, and international borders. His expertise in environmental epidemiology, honed over a decade, places him at the cutting edge of evaluating the health implications of policies in critical areas such as air pollution, climate change, urban design, and transportation. Rojas-Rueda is known for his dynamic collaborations with major entities like the U.S. Environmental Protection Agency and global organizations, including the World Health Organization, the Pan-American Health Organization and UN-Habitat. This global perspective amplifies the impact of his work, making Dr. Rojas-Rueda a sought-after voice in the quest for a healthier, more equitable world.