I always wondered if anybody has calculated how much of our global heating could be attributed, if any at all, to every electronic device, server, and engine outputting heat as a byproduct.
Humans produce about 20TW globally at this time (ChatGPT), while the sun adds about 174000TW of energy to the earth.
I guess you could argue that our waste heat does something, but I think the greenhouse gases that trap this enormous energy more effectively have a far bigger effect.
We use a fraction of the sun’s total energy output each year, orders of magnitude more energy are in sunlight radiating onto the Earth than in the heat rejected from buildings with air conditioning.
Estimated energy production from all combustion and nuclear from the industrial revolution onwards, assumed that heat was dumped into the atmosphere evenly at once, calculate temperature rise based on atmosphere makeup. Ignores the impact of some of that heat getting sinked into the ground and ocean, and the increased thermal radiation out to space over that period. In general, heat flows from the ground and ocean into the atmosphere instead of the other way around, and the rise in thermal radiation isn't that large.
On the other hand, this isn't something that the smart professionals ever talk about when discussing climate change, so I'm sure that the napkin math working out so close to explaining the whole effect has to be missing something.
We use ~20 TW, while solar radiation is ~500 PW and just the heating from global warming alone is 460TW (that is, how much heat is being accumulated as increased Earth temperature).
The amount of heat rejected to the atmosphere from electronic devices is negligible.