IT systems are expected to account for as much as https://www.bloomberg.com/news/articles/2021-04-08/the-chip-industry-has-a-problem-with-its-giant-carbon-footprint of the global energy demand by 2030. currently accounts for https://maritime-executive.com/article/transport-uses-25-percent-of-world-energy of the global energy demand.
A recent https://ieeexplore.ieee.org/document/9881520 published in the Institute of Electrical and Electronics Engineers (https://www.ieee.org/) Xplore proposes a framework for estimating the CO2 emissions software platforms produce over a year. Using this framework, two nominally similar technologies are compared against each other, showing that the more efficient platform reduces cost by 79% and CO2 emissions by 84%.
The sum of these two amounts is an estimated amount of emissions a software platform produces.