Vegetation data
Gross domestic product
Other macro economic data
Changes in agricultural yield
Net primary production
Ocean pH levels
Economic welfare impacts of pollutant-related health effects
The Integrated Global System Model (IGSM) is designed for analyzing the global environmental changes that may result from anthropogenic causes, quantifying the uncertainties associated with the projected changes, and assessing the costs and environmental effectiveness of proposed policies to mitigate climate risk. The tool analyzes interactions among humans and the climate system. It is used to study causes of global climate change and potential social and environmental consequences. GSM consists of two models. The first is Economic Projection and Policy Analysis (EPPA), which simulates economic, demographic, and technological processes impacting the environment at regional and global scales. EPPA feeds into the second, the MIT Earth System Model (MESM) which models the physical, dynamical, and chemical processes of Earth systems.