Urban air quality is affected by diverse volatile organic compounds (VOCs), and prior studies reveal a need to understand their seasonal sources. We combine high-resolution mass spectrometry with eddy...

npj Climate and Atmospheric Science - Emerging drivers of urban aerosol increase global change vulnerability in a US megacity

While ozone increases rapidly in wildfire plumes, downwind its production rate slows dramatically as nitrogen oxide levels decline.

Federal officials said they would freeze the money after Harvard said it would not submit to requests to overhaul hiring and report international students who break rules.