Emissions from computing are apparently higher than for air travel, and that’ll only go up in the coming decades.
“As a society we need to start treating computational resources as finite and precious, to be utilised only when necessary, and as effectively as possible. We need frugal computing: achieving our aims with less energy and material.”
https://arxiv.org/abs/2303.06642
Frugal Computing -- On the need for low-carbon and sustainable computing and the path towards zero-carbon computing
The current emissions from computing are almost 4% of the world total. This is already more than emissions from the airline industry and are projected to rise steeply over the next two decades.arXiv.org