Jack is a doctoral candidate in Environmental Science & Engineering at Harvard with a secondary field in STS. His dissertation explores the tensions between a changing atmosphere and the production of durable chemical knowledge in atmospheric science. Specifically, it interrogates “brown carbon,” a quasi-chemical entity that was recently invented by atmospheric chemists to make their science relevant for climate. He is broadly interested in how societies come to see the air as a political space, and how they mobilize different forms of meaning when addressing such topics as air pollution, climate change, and geoengineering.