Greenhouse gas emissions are generally categorized into three “scopes.” Scope 1 consists of emissions resulting from on-campus activities that we have direct control over and includes combustion at Abbott Power Plant, fleet emissions, and agricultural emissions. Scope 2 consists of emissions resulting from purchased electricity, which we have a moderate degree of control over. For example, we could reduce Scope 2 emissions by entering into power purchase agreements with low-carbon energy sources such as wind farms, biomass power plants, or nuclear power plants. Scope 3 consists of other emissions that occur off campus as a result of campus activities; these include commuting, air travel, solid waste, and the effects of purchasing goods and services.
This metric is the total of the three scopes.