The carbon footprint of our gadgets, the internet and the systems supporting them account for about 3.7% of global greenhouse emissions
It is similar to the amount produced by the airline industry globally,
Source: https://theshiftproject.org/wp-content/uploads/2019/03/Lean-ICT-Report_The-Shift-Project_2019.pdf
Source: https://www.bbc.com/future/article/20200305-why-your-internet-habits-are-not-as-clean-as-you-think