Carbon intensity of TPES is the annual mass of emitted CO₂ per unit of supplied energy, and is a measure of the carbonisation of an energy system.
There was no net-decarbonisation of the world energy system during the 18 year period from 1999 to the end of 2017.
All data shown is the most recent available as of August 2020. The most recent year varies with dataset.
The carbon intensity of the world’s total primaryenergy supply in 2017 equalled that in 1999; humanity made no progress to decarbonise the world energy system during this 18 year period, and the rate of decarbonisation since has been roughly the same as that during 1990-2000.
Carbon intensity values of world economies in 2019 are shown in the upper row of charts below, in red. The dotted line is world average. Changes relative to 1999 (two decades prior) are shown in the bottom row, in blue, with the dotted line denoting no change.