City of Sydney’s carbon inventory estimates for the year 2018/19 based on Global Protocol for Community-Scale Greenhouse Gas Emission Inventories (GPC).  The City of Sydney is compliant with international reporting standards such as the Compact of Mayors, CDP and C40, and has committed to working with cities across the globe to use consistent best practices in GHG emissions accounting. As a result, the City estimates its community-wide GHG emissions using the GPC Protocol for Cities.