"Estimates of the contribution of digital technologies to climate change suggest a range of 1.4%–5.9% of global GHG emissions, of which ∼31% is contributed by digital devices such as smartphones, desktops, displays, and netbooks (GEC, 2021). Moreover, the global supply chain of the electronics industry is among the top eight sectors accounting for more than 50% of the global carbon footprint (WEF, 2021)."
https://www.sciencedirect.com/science/article/pii/S2773167722000115*Aviation accounts for an estimated 2-3% of global carbon emissions.
https://www.carbonbrief.org/healthcare-in-worlds-largest-economies-accounts-for-4-of-global-emissions/https://ourworldindata.org/emissions-by-sector