The report considers a number of greenhouse gases, each with a different lifespan in our atmosphere, and a different quantum of warming per molecule.
It assesses both direct (production-based) emission sources within the geographic area and indirect (consumption-based) emission sources associated with goods and services imported into the geographic area.
Examples of indirect emission sources include electricity from the national grid, and transport that originates or terminates outside the city, like aviation.
Examples of consumption-based emission sources are emissions from product use occurring within the city, like refrigerants used in air conditioning as well as petrol and diesel consumed within the city boundary.
This report covers the period July 2016 to June 2017. We'll publish a new report every three years. The next one will cover July 2019 to June 2020, and will be available in 2021.