[JumpCrisscross]

> what percentage of planetary warming is due to direct heating from energy consumption, vs. greenhouse gas effects vs. natural causes

Humans produce 20 TW of power [1]. (15 if we remove solar, wind and hydro.) The Sun delivers, to the Earth, 44,000 TW [2].

So raising the amount of the Sun's energy the earth retains by 454 parts in a million (329 if we remove solar, wind and hydro) adds to the Earth the energy of our entire civilisation. That is why emissions are the problem. Not our direct heat production.

[1] https://en.wikipedia.org/wiki/World_energy_supply_and_consum...

[2] https://www.nasa.gov/wp-content/uploads/2015/03/135642main_b...

[pfdietz]

More significantly, indirect heating from increased greenhouse gases is about 400 TW.

[vixen99]

Link?

[pfdietz]

Thanks for making me check, I was off a bit. It's actually more like 1400 TW. Must have dropped a digit when I remembered that.

https://link.springer.com/article/10.1007/s00382-023-06775-x

> the total radiative forcing (RF) by human activities of approximately 2.72 W m^−2 (Masson-Delmotte 2021)

(with the radius of the Earth of 6.4e6 meters and surface area = 4 pi r^2).