Compute CO₂ from population × GDP per person × energy per GDP × CO₂ per energy.
| CO₂ | – |
Use this calculator to decompose a national or regional carbon total the way the Kaya identity does, so you can see which lever is doing the work.
The calculation is: CO₂ = population × GDP per capita × energy per GDP × CO₂ per energy. Keep the units consistent with each other: if population is in millions, GDP is in the same money unit you used to build energy per GDP, and so on. The product is just a number in whatever CO₂ unit your last factor uses (often Mt or Gt).
This is an identity, not a forecast. It does not model policy, prices, or technology change.
Population: Number of people. 60 can mean 60 million if the other factors are built that way.
GDP per capita: Average income per person, in the same money unit as energy per GDP.
Energy / GDP: Energy used per unit of GDP (energy intensity).
CO₂ / energy: Carbon intensity of that energy.
CO₂: Product of the four factors.
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