Recently there are new detailed calculations available on the total budget (2018).  See chapter 1.1 for more info, and the carbon countdown page

(these have not yet been implemented in this research)

In advance of the SBE19 conference in Graz, there will be a two day workshop on the carbon budget topic. https://www.tugraz.at/events/sbe19/home/

While we are part of a energy transition globally, many calculations are made based on costs, in cts/kWh, and wind and solar now seem to become very cheap. But its not about costs. That’s artificial, its about real and absolute CO2 levels, and energy efficiency. So I found data for EROI ( energy return on investment), and for CO2 emissions/kWh. And I put them together: which one scores best in both categories? Only 3…

See the new chapter 3.4

In a society to function sustainable, it is assumed that the yearly CO2 budget per capita is 1 ton. ( Where its is now around 10 ton CO2-eq per capita year in countries like Germany and the Netherlands). A major challenge. In this report by the German ministry for the environment, this scenario is explored:

https://www.umweltbundesamt.de/sites/default/files/medien/376/publikationen/germany_2050_a_greenhouse_gas_neutral_country_langfassung.pdf