In September 2007, American Public University System (APUS) signed the American College and University Presidents Climate Commitment (ACUPCC) as a charter signatory.  There are now more than 600 signatories to the commitment.  Each institution is required to complete and submit a Greenhouse Gas (GHG) Emissions Inventory within one year of signing the commitment (click here to view APUS’ GHG Emissions Inventory) and within two years of signing, signatories are required to complete and submit a Climate Action Plan (CAP).