Specific areas of current interest include:
1. Production, cycling and sequestration of volatiles on the Earth-carbon cycling, CO2 content of the atmosphere and oceans and its influence on the climate and biota; factors influencing sea level, and oceanic temperatures and salinity, through geologic time; origin and variation of atmospheric oxygen and nitrogen;
2. The fate of organic materials in sediments and in the oceanic water column; their modes of chemical breakdown and transfer, especially as related to cycling of carbon;
3. Combustion and pyrolysis of natural materials and the dependence of these processes on atmospheric and climatologic conditions;
4. Modeling of the response of organisms and ecosystems to changes in environmental conditions, using thermodynamic and statistical mechanical methods.