- “Intelligent Fertilizer”TM Development
- Environment, Air Quality, and Climate: Emission, transport, transformation, and fate of pollutants
- Agricultural air quality
- Biogeochemical Modeling of Nitrogen Compounds
- Climate change
- Satellite Remote Sensing
- Measurement and modeling of biogenic emissions of trace gases
- Photochemical oxidants and gas-to-particle conversion
- Pollutant monitoring and control