The Planetary Accounting Framework: a novel, quota-based approach to understanding the impacts of any scale of human activity in the context of the Planetary Boundaries

Table 5 Each of the Planetary Quotas is shown against the estimate current global status

Planetary Quota	Control Variable and Global Limit	Estimate of Current Global Status
Carbon	Net CO₂ emissions ≤ −7.3 GtCO₂/yr	~ 36 GtCO₂/yr. [104]
MeNox	Me-NO emissions ≤5.4GtCO₂e/yr	~ 11 GtCO₂e/yr.^a
Forestland	Deforestation ≤ -11Mha/yr	6.5 Mha/yr [105]
Aerosols	0.04 ≤ AODe ≤0.1	Data not available^b
Ozone	Montreal gas emissions ≈ ≤ 0 ODPkgs/yr	Data not available
Nitrogen	Net nitrogen released to the environment ≤62Tg/yr	~ 150 Tg/yr [12]
Phosphorous	Net phosphorus released to the environment ≤11Tg/yr	~ 22 Tg/yr [12]
Water	Net water consumption ≤8500km³/yr	~ 8500 km³/yr^c
Biodiversity	Percentage disappearing fraction of species ≤1E-4/yr	1E-5 – 1E-6/yr^d
Imperishable Waste	Net imperishable waste ≤0 kg	Data not available

^aDerived from [104]
^bIn 2016, 92% of the world’s population lived in areas that exceed the World Health Organisation ambient air quality guidelines [106]. This suggests this Quota (which is based on these guidelines) has been exceeded
^cThere is no indicator or limit proposed for the Planetary Boundary - novel entities. However, under the PQs this Boundary is addressed by proxy through the water Quota
^dBased on background extinction rate of 100–1000 extinctions per million per year [12]

ISSN: 2520-8748